上的Page_Load

Question

禁用列表框，我試圖禁用我的網頁形式的負載兩個列表框，但列表框不禁止。我嘗試了下面的代碼，但它仍然不適用於我的案例。請讓我知道我要去哪裏錯了。

設計器代碼

<telerik:RadListBox ID="lbSelectedDepartmentContacts" runat="server" Width="220px" AutoPostBackOnTransfer="true" AutoPostBackOnReorder="true" AutoPostBackOnDelete="true" CheckBoxes="false" AllowTransfer="true" AllowTransferOnDoubleClick="true" TransferToID="lbDepartmentContacts" 
                      Height="276px" SelectionMode="Single" AllowReorder="True"> 
                      <ButtonSettings ShowTransfer="false" ShowTransferAll="false" ReorderButtons="Common" ShowReorder="true" /> 
                     </telerik:RadListBox> 
                    </td> 
                   </tr> 
                   <tr> 
                    <td align="right"> 
                     <telerik:RadListBox ID="lbDepartmentContacts" runat="server" Width="200px" CheckBoxes="false" AutoPostBackOnTransfer="true" AllowTransfer="true" AllowTransferOnDoubleClick="true" TransferToID="lbSelectedDepartmentContacts" 
                      Height="250px" SelectionMode="Single"> 
                      <ButtonSettings TransferButtons="Common" ShowTransfer="false" ShowTransferAll="false" /> 
                     </telerik:RadListBox> 

BACKCODE

public void DisableControls() 
     { 
System.Text.StringBuilder sb = new System.Text.StringBuilder(); 
      sb.Append(@"<script language='javascript'>function DisableControls(){"); 
      sb.Append(@"var lbl = document.getElementById('lbSelectedDepartmentContacts').disabled = true;"); 
      sb.Append(@" var Txt = document.getElementById('txtDepartmentCategoryContactsFilter').disabled = true;"); 
      sb.Append(@" var btn = document.getElementById('RadButton1').disabled = true;"); 

      sb.Append("}</script>"); 

      if (!ClientScript.IsClientScriptBlockRegistered("JSScriptBlock")) 
      { 
       ClientScript.RegisterClientScriptBlock(this.GetType(), "JSScriptBlock", 
       sb.ToString()); 
      } 

      string funcCall = "<script language='javascript'>DisableControls();</script>"; 

      if (!ClientScript.IsStartupScriptRegistered("JSScript")) 
      { 
       ClientScript.RegisterStartupScript(this.GetType(), "JSScript", funcCall); 
      } 
} 

也嘗試：

Page.ClientScript.RegisterStartupScript(this.GetType(), "text", "DepartmentLoad();", true); 

JavaScript代碼

function DepartmentLoad(){ 
      document.getElementById("lbSelectedDepartmentContacts").disabled = true; 
      document.getElementById("lbDepartmentContacts").disabled = true; 
      document.getElementById("txtDepartmentCategoryContactsFilter").disabled = true; 
      ducument.getElementById("RadButton1").disabled = true;} 

Answer 1

C＃唯一的方法來禁用2個列表框...

刪除或註釋掉現有DisableControls()方法然後添加以下...

protected void Page_Load(object sender, EventArgs e) 
{ 
    if (Page.IsPostBack) return; 
    DisableControls(); 
} 

private void DisableControls() 
{ 
    lbSelectedDepartmentContacts.Enabled = lbDepartmentContacts.Enabled = false; 
} 

Answer 2

通常應該：

• 使用Sys.Application.Load註冊腳本。調用函數早期會引起問題與使用IScriptControls的客戶端API：http://msdn.microsoft.com/en-us/library/bb383829.aspx和http://docs.telerik.com/devtools/aspnet-ajax/controls/window/troubleshooting/executing-javascript-code-from-server。

• 使用API​​的Telerik的控制提供了：http://docs.telerik.com/devtools/aspnet-ajax/controls/listbox/client-side-programming/objects/radlistbox-object。

似乎是客戶端（至少在寫作的時間）沒有set_enabled（）或set_disabled（）方法，因此這似乎是不可能的JS，所以你應該與其他答案去它告訴你使用服務器代碼。