如果使用更新面板，一旦客户端使用css单击按钮，您可以使屏幕变灰。这样可以防止二次点击。

 <   ProgressTemplate  >  
<   div     class   =  divWaiting >  

。divWaiting {
 position：absolute; 
 background-color：black; 
 z-index：2147483647！important; 
不透明度：0.6; 
溢出：隐藏; 
 text-align：center;顶部：0;左：0; 
身高：100％; 
宽度：100％; 
填充顶部：20％; 
} 

我成功地使用了以下解决方案。我从我的同事那里得到了这个剧本。它使用JavaScript函数来禁用和启用按钮。禁用它时也会将按钮图像设置为.gif以指示处理。



如果已经将其作为另一个线程的解决方案发布，请原谅我。

  function  disableBtn（btnID，newText）{
 //  初始化以避免'Page_IsValid未定义'JavaScript错误 
 Page_IsValid = 空跨度>; 
 //  检查页面是否请求任何验证 
 //  如果是，请检查页面是否有效 
 if （ typeof （Page_ClientValidate）== '  function '）{
 Page_ClientValidate（）; 
 //  您也可以传递验证组名称 
} 
 //  变量 
 var  btn =  document  .getElementById（btnID）; 
 var  isValidationOk = Page_IsValid; 
 / *   ******* NEW UPDATE *********** ************************* /  
 //  如果不是IE，则在重定向/渲染之前启用卸载按钮 
 if （ navigator  .appName！== '  Microsoft Internet Explorer' ）
 {
 EnableOnUnload（btnID，btn.value）; 
} 
 / *   ********** END UPDATE *** ************************* /  
 //   isValidationOk不为空 
如果（isValidationOk！==  null ）{
 //  页面有效 
 if （isValidationOk）{
 btn.disabled =  true ; 
 btn.value = newText; 
 btn.style.background = '  url（〜/ images / ajax-loader.gif）'跨度>; 
} 
其他 { //  页面无效 
 btn.disabled =  false ; 
} 
} 
其他 { //  页面没有任何验证请求 
 setTimeout（  setImage（' + btnID +  '）， 10 跨度>）; 
 btn.disabled =  true ; 
 btn.value = newText; 
} 
} 

 //  设置背景图片按钮 
 function  setImage（btnID）
 {
 var  btn =  document  .getElementById（btnID）; 
 btn.style.background = '  url（images / loading.gif）'; 
} 

 //  启用按钮并恢复原始文本值 
 function  EnableOnUnload（btnID，btnText）
 {
 window  .onunload =  function （）
 {
 var  btn = 文档跨度> .getElementById（btnID）; 
 btn.disabled =  false ; 
 btn.value = btnText; 
} 
} 

在UseSubmitBehaviour设置为false的情况下，包含对disableBtn OnClientClick的调用。

 <   asp：button     id   =  btnSubmit    runat   =  server    onclientclick   =  disableBtn（this.id，'正在提交...'）    text   = 提交    usesubmitbehavior pan>  =  False    xmlns：asp   = ＃unknown    /  >  

hi to all,
Here i need how to avoid multiple click, here i done that process.now need is if i click save validation message show two time.how to avoid that.

coding is:-

script:

function ClientSideClick(myButton) {

            if (typeof (Page_ClientValidate) == 'function')
               {
                if (Page_ClientValidate() == false)
                { return false; }
            }


            if (myButton.getAttribute('type') == 'button') {

                myButton.disabled = true;

            }

button is:-

<asp:Button ID="InsertButton" runat="server" CausesValidation="True" CommandName="Insert"
                                                                                  CssClass="savebutton1231" EnableTheming="false" SkinID="skinBtnSave" onclientclick="ClientSideClick(this)" UseSubmitBehavior="false" OnClick="InsertButton_Click"></asp:Button>

i need how to avoid same validation message twice.

if using an updatepanel you can grey out the screen once the client clicks the button using css. this will prevent a secondary click.

<ProgressTemplate>
<div class="divWaiting">

.divWaiting{
position: absolute;
background-color: black;
z-index: 2147483647 !important;
opacity: 0.6;
overflow: hidden;
text-align: center; top: 0; left: 0;
height: 100%;
width: 100%;
padding-top:20%;
}

I have used the solution below with success. I had gotten this script from a co-worker of mine. It uses JavaScript functions to disable and enable the button. While disable it also sets the button image to a .gif to indicate processing.

Forgive me if this was already posted as a solution on another thread.

function disableBtn(btnID, newText) {
    //initialize to avoid 'Page_IsValid is undefined' JavaScript error
    Page_IsValid = null;
    //check if the page request any validation   
    // if yes, check if the page was valid
    if (typeof (Page_ClientValidate) == 'function') {
        Page_ClientValidate();
        //you can pass in the validation group name also
    }
    //variables
    var btn = document.getElementById(btnID);
    var isValidationOk = Page_IsValid;
    /********NEW UPDATE************************************/   
    //if not IE then enable the button on unload before redirecting/ rendering   
    if (navigator.appName !== 'Microsoft Internet Explorer')
    {
           EnableOnUnload(btnID, btn.value);   
    }   
    /***********END UPDATE ****************************/   
    // isValidationOk is not null
    if (isValidationOk !== null) {
        //page was valid
        if (isValidationOk) {
            btn.disabled = true;
            btn.value = newText;
            btn.style.background = 'url(~/images/ajax-loader.gif)';
        }
        else {//page was not valid
            btn.disabled = false;
        }
    }
    else {//the page don't have any validation request
        setTimeout("setImage('"+btnID+"')", 10);
        btn.disabled = true;
        btn.value = newText;
    }
}

//set the background image of the button
function setImage(btnID) 
{
    var btn = document.getElementById(btnID);
    btn.style.background = 'url(images/loading.gif)';
}

//enable the button and restore the original text value
function EnableOnUnload(btnID, btnText)
{
    window.onunload = function()
    {
            var btn = document.getElementById(btnID);
            btn.disabled = false;
            btn.value = btnText;
    }
}

Include a call to disableBtn OnClientClick with UseSubmitBehaviour set to false.

<asp:button id="btnSubmit" runat="server" onclientclick="disableBtn(this.id, 'Submitting...')" text="Submit" usesubmitbehavior="False" xmlns:asp="#unknown" />