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POHow to disable postback of radiobutton based on some conditions in asp.net on client side?
 

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  1. POHow to disable postback of radiobutton based on some conditions in asp.net on client side?
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    <p>I have a radiobutton list defined in my form. When the user selects any option, we do a postback and then business logic is executed. Now the problem is, I want to add a confirmation from user whenever he checks a radio button option; when the user selects OK then only I want to go ahead.</p> <p>Sample Flow: <br> 1. Assume FirstItem in radiobutton is checked.<br> 2. The user will go and select the second item - Then I want to add a confirmation like "Are you sure " - <br> 3. If the user selects NO <br> &nbsp; &nbsp; &nbsp; Then I should revert the check changed without the postback<br> &nbsp;&nbsp;&nbsp;&nbsp;Else <br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Perform the postback and then business logic <br><br>The code is as follows:</p> <pre><code>&lt;form id="form1" runat="server"&gt; &lt;asp:ScriptManager ID="ScriptManager1" runat="server"&gt; &lt;/asp:ScriptManager&gt; &lt;div&gt; &lt;asp:UpdatePanel ID="UpdatePanelCheckBoxes" runat="server" UpdateMode="Always"&gt; &lt;ContentTemplate&gt; &lt;asp:RadioButtonList ID="rdo" runat="server" RepeatDirection="Horizontal" AutoPostBack="true" OnSelectedIndexChanged="LabourScheduleType_CheckedChanged"&gt; &lt;asp:ListItem Text="1" Value="1" onClick="confirmcheck();"&gt;&lt;/asp:ListItem&gt; &lt;asp:ListItem Text="2" Value="2" onClick="confirmcheck();"&gt;&lt;/asp:ListItem&gt; &lt;/asp:RadioButtonList&gt; &lt;/ContentTemplate&gt; &lt;/asp:UpdatePanel&gt; &lt;/div&gt; &lt;/form&gt; </code></pre> <p>The code-behind code is like this </p> <p>I wrote a javascript function also to control the postback </p> <pre><code>&lt;script type="text/javascript"&gt; function confirmcheck() { var retVal = confirm("test"); return retVal; } &lt;/script&gt; </code></pre> <p><br> I tried everything like adding an attribute like onclick and then returning false in the method and so on. Somehow the postback always happens and I do not know how to revert the check changed also ! I am going crazy over this from past 4 hours.</p> <p><strong>EDIT1:</strong></p> <p>I was searching over internet and found solution to half of my problem ! </p> <pre><code> &lt;asp:UpdatePanel ID="UpdatePanelCheckBoxes" runat="server" UpdateMode="Always"&gt; &lt;ContentTemplate&gt; &lt;asp:RadioButton ID="RadioButton1" OnCheckedChanged="aaa_cc" GroupName="aa" runat="server" AutoPostBack="true" Text="test1" /&gt; &lt;asp:RadioButton ID="RadioButton2" OnCheckedChanged="aaa_cc" GroupName="aa" runat="server" AutoPostBack="true" Text="test2" /&gt; &lt;/ContentTemplate&gt; &lt;/asp:UpdatePanel&gt; </code></pre> <p>The code behind file : </p> <pre><code>protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { RadioButton1.Attributes.Add("onClick", "this.blur(); return RadioClick(this);"); RadioButton2.Attributes.Add("onClick", "this.blur(); return RadioClick(this);"); } } </code></pre> <p>Javacript goes like this:</p> <pre><code>&lt;script type="text/javascript"&gt; function RadioClick(radioButton) { if (confirm('Are you sure?')) { __doPostBack(radioButton.id,''); } else { return false; } } &lt;/script&gt; </code></pre> <p><strong>The only problem is when i return false, the value in radio button is lost i.e. none of the radio buttons are selected :(</strong></p>
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