C＃下拉列表更改事件 [英] C# dropdownlist change event

问题描述

 < asp：DropDownList runat =serverID =myListDropDownCssClass =textOnSelectedIndexChanged =myListDropDown_Change/> 
  

有上面的aspx $ /

  protected void myListDropDown_Change（object sender，EventArgs e）
 {
 //从未得到的东西
} 
  / pre> 
 
 
我在myListDropDown方法上设置了一个断点，但它从未被击中。任何建议？
解决方案
设置 DropDownList  属性的系统.web.ui.webcontrols.listcontrol.autopostback.aspxrel =noreferrer>  code> control to  true 。
 < asp： DropDownList AutoPostBack =truerunat =serverID =myListDropDown
 CssClass =textOnSelectedIndexChanged =myListDropDown_Change/> 
  
 
<asp:DropDownList runat="server" ID="myListDropDown" CssClass="text" OnSelectedIndexChanged="myListDropDown_Change" />
There's the aspx above
protected void myListDropDown_Change(object sender, EventArgs e)
        {
            //stuff that never gets hit
        }
I put a break point on the myListDropDown method but it never gets hit. Any suggestions?
解决方案
Set AutoPostBack property of your DropDownList control to true.
<asp:DropDownList AutoPostBack="true" runat="server" ID="myListDropDown" 
                CssClass="text" OnSelectedIndexChanged="myListDropDown_Change" />


                        
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