VDH
439 lines
13 KiB
Markdown
439 lines
13 KiB
Markdown
# C++ to C# Unity String Format Conversion Guide
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## Overview
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This guide explains how to convert the C++ string formatting pattern used in Perfect World Online to C# Unity.
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---
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## The Original C++ Code
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From `DlgSkillSubListItem.cpp`, line 290:
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```cpp
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int needMoney = CECHostSkillModel::Instance().GetSkillMoney(m_skillID, m_curLevel + 1);
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int needSp = CECHostSkillModel::Instance().GetSkillSp(m_skillID, m_curLevel + 1);
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ACString str;
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str.Format(GetStringFromTable(11326), needMoney, needSp);
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GetGameUIMan()->MessageBox("Game_LearnSkill", str, MB_OKCANCEL, A3DCOLORRGBA(255, 255, 255, 160), &pMsgBox);
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pMsgBox->SetData(m_skillID);
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```
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### What This Code Does:
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1. **Gets skill upgrade costs**: Retrieves the money and skill points needed for the next level
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2. **Formats localized string**: Uses `GetStringFromTable(11326)` to get a template string, then formats it with the cost values
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3. **Shows confirmation dialog**: Displays a message box with OK/Cancel buttons
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4. **Attaches data**: Associates the skill ID with the dialog
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---
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## The C# Unity Conversion
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From `CDlgSkillSubListItem.cs`:
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```csharp
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// Get the required money and skill points for the next level
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int needMoney = CECHostSkillModel.Instance.GetSkillMoney(m_skillID, m_curLevel + 1);
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int needSp = CECHostSkillModel.Instance.GetSkillSp(m_skillID, m_curLevel + 1);
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// Format the confirmation message string
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// C++ equivalent: str.Format(GetStringFromTable(11326), needMoney, needSp);
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string confirmMessage = string.Format(GetStringFromTable(11326), needMoney, needSp);
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// Show confirmation dialog with OK/Cancel buttons
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uiManager.ShowConfirmDialog(
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"Game_LearnSkill",
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confirmMessage,
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onConfirm: () => {
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// Player confirmed - learn the skill
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CECHostSkillModel.Instance.LearnSkill(m_skillID);
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},
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onCancel: null,
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skillData: m_skillID
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);
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```
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---
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## Key Conversion Patterns
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### 1. String Formatting
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**C++ (ACString)**:
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```cpp
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ACString str;
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str.Format(GetStringFromTable(11326), needMoney, needSp);
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```
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**C# (string)**:
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```csharp
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string confirmMessage = string.Format(GetStringFromTable(11326), needMoney, needSp);
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```
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**Notes**:
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- C++'s `ACString::Format()` is a member function
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- C#'s `string.Format()` is a static function
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- Both use the same placeholder syntax: `%d` (C++) or `{0}`, `{1}` (C#)
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- If your string table uses C++ format specifiers, you may need to convert them:
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- `%d` → `{0}`, `{1}` for integers
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- `%s` → `{0}`, `{1}` for strings
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- `%f` → `{0}`, `{1}` for floats
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### 2. Message Box with Callbacks
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**C++ (Pointer-based)**:
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```cpp
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PAUIDIALOG pMsgBox;
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GetGameUIMan()->MessageBox("Game_LearnSkill", str, MB_OKCANCEL,
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A3DCOLORRGBA(255, 255, 255, 160), &pMsgBox);
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pMsgBox->SetData(m_skillID);
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// Later, in message handler:
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void OnMessageBox_OK(const char* szName) {
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if (strcmp(szName, "Game_LearnSkill") == 0) {
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PAUIDIALOG pMsgBox = GetGameUIMan()->GetDialog(szName);
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int skillID = pMsgBox->GetData();
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// Learn skill...
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}
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}
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```
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**C# (Callback-based)**:
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```csharp
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uiManager.ShowConfirmDialog(
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"Game_LearnSkill",
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confirmMessage,
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onConfirm: () => {
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// This code runs when player clicks OK
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CECHostSkillModel.Instance.LearnSkill(m_skillID);
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},
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onCancel: () => {
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// This code runs when player clicks Cancel (optional)
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},
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skillData: m_skillID
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);
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```
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**Key Differences**:
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- C++ uses pointers and manual dialog lookup
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- C# uses lambda callbacks (closures) that capture variables
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- C# is more straightforward - no need to check dialog names or retrieve data manually
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### 3. Localized String Table
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**Both versions use the same approach**:
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```csharp
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// Get localized string template from string table
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// String ID 11326 might contain: "学习此技能需要 {0} 金钱和 {1} 技能点，确定学习吗？"
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// English: "Learning this skill requires {0} money and {1} skill points, confirm?"
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string template = GetStringFromTable(11326);
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// Format with actual values
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string message = string.Format(template, needMoney, needSp);
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// Result: "Learning this skill requires 2480 money and 34200 skill points, confirm?"
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```
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---
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## Complete Example Comparison
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### C++ Version (Original)
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```cpp
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void CDlgSkillSubListItem::OnCommand_Upgrade(const char* szCommand) {
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CECHostPlayer* player = GetHostPlayer();
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PAUIDIALOG pMsgBox;
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// Check player state...
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if (player->IsDead() || player->IsSitting() || /* ... */) {
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GetGameUIMan()->MessageBox("", GetGameUIMan()->GetStringFromTable(11327),
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MB_OK, A3DCOLORRGBA(255, 255, 255, 160), &pMsgBox);
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return;
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}
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// Check learning conditions...
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int nCondition = CECHostSkillModel::Instance().CheckLearnCondition(m_skillID);
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int nCheckCode = 0;
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if (1 == nCondition) {
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nCheckCode = 270;
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} else if (6 == nCondition) {
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nCheckCode = 527;
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}
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// ... more conditions ...
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if (nCheckCode == 0) {
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// Show confirmation dialog
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int needMoney = CECHostSkillModel::Instance().GetSkillMoney(m_skillID, m_curLevel + 1);
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int needSp = CECHostSkillModel::Instance().GetSkillSp(m_skillID, m_curLevel + 1);
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ACString str;
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str.Format(GetStringFromTable(11326), needMoney, needSp);
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GetGameUIMan()->MessageBox("Game_LearnSkill", str, MB_OKCANCEL,
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A3DCOLORRGBA(255, 255, 255, 160), &pMsgBox);
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pMsgBox->SetData(m_skillID);
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if (!GetGameUIMan()->m_pDlgSkillAction->IsReceivedNPCGreeting()) {
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CECHostSkillModel::Instance().SendHelloToSkillLearnNPC();
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}
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} else {
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// Show error message
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GetGameUIMan()->MessageBox("", GetGameUIMan()->GetStringFromTable(nCheckCode),
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MB_OK, A3DCOLORRGBA(255, 255, 255, 160), &pMsgBox);
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pMsgBox->SetLife(3);
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}
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}
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// Separate message handler
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void CDlgSkillSubListItem::OnMessageBox_OK(const char* szName) {
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if (strcmp(szName, "Game_LearnSkill") == 0) {
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PAUIDIALOG pMsgBox = GetGameUIMan()->GetDialog(szName);
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int skillID = pMsgBox->GetData();
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// Send learn skill command to server
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CECHostSkillModel::Instance().LearnSkill(skillID);
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}
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}
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```
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### C# Unity Version (Converted)
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```csharp
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private void OnCommand_Upgrade()
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{
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CECHostPlayer player = GetHostPlayer();
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if (player == null)
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{
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return;
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}
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var uiManager = CECUIManager.Instance;
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var gameUIMan = uiManager.GetInGameUIMan();
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// Check player state...
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if (player.IsDead() ||
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player.IsSitting() ||
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player.IsChangingFace() ||
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player.IsTrading() ||
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player.GetBoothState() != 0 ||
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player.IsRooting() ||
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player.IsHangerOn() ||
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player.GetCurSkill() != null ||
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player.IsFighting())
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{
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uiManager.ShowMessageBox("MessageBox", gameUIMan.GetStringFromTable(11327));
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return;
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}
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// Check learning conditions...
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int nCondition = CECHostSkillModel.Instance.CheckLearnCondition(m_skillID);
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int nCheckCode = 0;
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if (1 == nCondition)
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{
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nCheckCode = 270;
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}
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else if (6 == nCondition)
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{
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nCheckCode = 527;
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}
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// ... more conditions ...
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if (nCheckCode == 0)
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{
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// Get the required costs
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int needMoney = CECHostSkillModel.Instance.GetSkillMoney(m_skillID, m_curLevel + 1);
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int needSp = CECHostSkillModel.Instance.GetSkillSp(m_skillID, m_curLevel + 1);
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// Format the confirmation message
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string confirmMessage = string.Format(GetStringFromTable(11326), needMoney, needSp);
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// Show confirmation dialog with inline callback
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uiManager.ShowConfirmDialog(
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"Game_LearnSkill",
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confirmMessage,
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onConfirm: () => {
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// This runs when player clicks OK
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// No need to look up dialog or retrieve data - it's captured in closure
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CECHostSkillModel.Instance.LearnSkill(m_skillID);
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},
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onCancel: null,
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skillData: m_skillID
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);
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// 如果打开对话框时NPC发送的Hello消息没有收到回复，再次发送
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// If the NPC Hello message hasn't been received when opening dialog, send again
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if (!gameUIMan.IsReceivedNPCGreeting())
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{
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CECHostSkillModel.Instance.SendHelloToSkillLearnNPC();
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}
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}
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else
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{
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// Show error message with auto-close after 3 seconds
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uiManager.ShowMessageBox("", gameUIMan.GetStringFromTable(nCheckCode), autoCloseTime: 3f);
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}
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}
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```
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---
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## String Format Examples
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### Example 1: Simple Integer Formatting
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**C++ String Table Entry (ID 11326)**:
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```
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"学习此技能需要 %d 金钱和 %d 技能点，确定学习吗？"
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```
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**C# String Table Entry (ID 11326)** (if you convert to C# format):
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```
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"学习此技能需要 {0} 金钱和 {1} 技能点，确定学习吗？"
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```
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**Usage**:
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```csharp
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string message = string.Format(GetStringFromTable(11326), 2480, 34200);
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// Result: "学习此技能需要 2480 金钱和 34200 技能点，确定学习吗？"
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// English: "Learning this skill requires 2480 money and 34200 skill points, confirm?"
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```
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### Example 2: Mixed Types
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**String Table**:
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```
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"Skill: {0}, Level: {1}, Cost: {2:N0} gold"
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```
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**Usage**:
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```csharp
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string skillName = "Fireball";
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int level = 5;
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int cost = 10000;
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string message = string.Format(GetStringFromTable(123), skillName, level, cost);
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// Result: "Skill: Fireball, Level: 5, Cost: 10,000 gold"
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```
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### Example 3: With Colors (Unity TextMeshPro)
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**C++**:
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```cpp
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ACString strSp;
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strSp.Format(GetStringFromTable(11402), needSp);
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if (spOK) {
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strSp = l_colorWhite + strSp; // l_colorWhite = "^ffffff"
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} else {
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strSp = l_colorRed + strSp; // l_colorRed = "^ff0000"
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}
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```
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**C# (Unity TextMeshPro)**:
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```csharp
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const string l_colorWhite = "<color=#ffffff>";
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const string l_colorRed = "<color=#ff0000>";
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const string l_colorClose = "</color>";
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string strSp = string.Format(GetStringFromTable(11402), needSp);
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if (spOK) {
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strSp = l_colorWhite + strSp + l_colorClose;
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} else {
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strSp = l_colorRed + strSp + l_colorClose;
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}
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```
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---
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## Common Pitfalls
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### ❌ Wrong: Using C++ format specifiers in C#
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```csharp
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// This won't work if the string uses C++ format specifiers
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string template = "Cost: %d gold"; // C++ style
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string message = string.Format(template, 1000); // Error!
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```
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### ✅ Correct: Convert to C# format
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```csharp
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string template = "Cost: {0} gold"; // C# style
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string message = string.Format(template, 1000); // "Cost: 1000 gold"
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```
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### ❌ Wrong: Forgetting to capture variables in lambda
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```csharp
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void ShowDialog(int skillID) {
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int needMoney = GetMoney(skillID);
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// Wrong: using skillID parameter instead of captured value
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ShowConfirmDialog("Learn", "Confirm?",
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onConfirm: () => {
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LearnSkill(skillID); // This captures the parameter, which is fine
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}
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);
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}
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```
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This is actually correct, but be careful with loop variables:
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```csharp
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// Dangerous in loops!
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for (int i = 0; i < skills.Length; i++) {
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int skillID = skills[i];
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ShowButton(skillID, () => {
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LearnSkill(skillID); // Captures skillID, which changes each iteration
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});
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}
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```
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### ✅ Correct: Capture loop variable properly
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```csharp
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for (int i = 0; i < skills.Length; i++) {
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int currentSkillID = skills[i]; // Create a copy for this iteration
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ShowButton(currentSkillID, () => {
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LearnSkill(currentSkillID); // Captures the copy, safe!
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});
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}
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```
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---
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## Implementation Checklist
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When converting C++ string formatting to C# Unity:
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- [ ] Replace `ACString` with `string`
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- [ ] Replace `str.Format(...)` with `string.Format(...)`
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- [ ] Convert format specifiers if needed (`%d` → `{0}`)
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- [ ] Replace pointer-based message boxes with callback-based dialogs
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- [ ] Use lambda expressions to capture context
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- [ ] Update color codes for Unity (TextMeshPro uses `<color=#RRGGBB>`)
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- [ ] Replace `pMsgBox->SetLife(seconds)` with `autoCloseTime` parameter
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- [ ] Remove manual dialog lookup code
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- [ ] Keep Chinese comments and add English translations side by side
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---
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## Summary
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The key difference between C++ and C# Unity for string formatting:
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| Aspect | C++ | C# Unity |
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| **String type** | `ACString` | `string` |
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| **Format method** | `str.Format(template, args)` | `string.Format(template, args)` |
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| **Format specifiers** | `%d`, `%s`, `%f` | `{0}`, `{1}`, `{2}` |
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| **Message box** | Pointer + callback lookup | Lambda callbacks |
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| **Data passing** | `pMsgBox->SetData(data)` | Closure captures |
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| **Colors** | `^ffffff` | `<color=#ffffff>...</color>` |
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| **Auto-close** | `pMsgBox->SetLife(seconds)` | `autoCloseTime: seconds` |
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The C# version is generally more concise and type-safe thanks to lambda expressions and closure capture!
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