如何将此代码片段转换为C＃

Question

我想弄清楚how to display confirm box when drop down list's selected indexchanged事件是否被解雇。

浏览通过一些论坛我遇到了以下解决方案，但我不知道如何使用它，因为我在C＃工作。我如何使它工作？我甚至不确定这是否真的是解决我的问题的方法。有人请帮忙。谢谢。

Public Sub ConfirmOnChange() 
      'Register the script block 
      If Not IsStartupScriptRegistered("CSP-ddl-onchange") Then 
       RegisterStartupScript("CSP-ddl-onchange", _ 
        "<script language=""JavaScript"">" & _ 
        "var CSP_savedDDLID = " & _ 
        "document.getElementById('" & _ 
        ddl.ClientID & "').value;" & vbCrLf & _ 
        "function resetDDLIndex() {" & vbCrLf & _ 
        " document.getElementById('" & _ 
        ddl_Status.ClientID & "').value = CSP_savedDDLID;" & _ 
        vbCrLf & _ 
        "}" & vbCrLf & _ 
        "</script>") 
      End If 
      Dim msg As String = "'Do you want to change selection?';" 
      ddl_Status.Attributes("onchange") = _ 
      "if (!confirm('" & msg.Replace("'", "\'") & _ 
      "')) resetDDLIndex(); " 
     End Sub 

Answer 1

public void ConfirmOnChange() 
{ 
    //Register the script block 
    if(!IsStartupScriptRegistered("CSP-ddl-onchange")) 
    { 
     RegisterStartupScript("CSP-ddl-onchange", 
      "<script language=\"JavaScript\">" + 
      "var CSP_savedDDLID = " + 
       "document.getElementById('" + 
       ddl.ClientID + "').value;" + "\r\n" + 
      "function resetDDLIndex() {" + "\r\n" + 
      " document.getElementById('" + 
       ddl_Status.ClientID + "').value = CSP_savedDDLID;" + 
      "\r\n" + 
      "}" + "\r\n" + 
      "</script>"); 
    } 
    string msg = "'Do you want to change selection?';"; 
    ddl_Status.Attributes("onchange") = "if (!confirm('" & msg.Replace("'", "\'") + 
    "')) resetDDLIndex(); "; 
}