在下面的代码中，我如何使用验证器...该字段不应为空. [英] In the below code how can i use validator...that field should not be blank.

问题描述

 
< asp:label id ="lblOpenid" cssclass ="lblOpen" runat ="server" text ="OpenJobsBySpecificId" xmlns:asp =#unknown">
< asp:textbox id ="TextBox1" runat =服务器" width ="78px" xmlns:asp =#unknown">

< asp:button id ="Button1" runat =服务器" text ="Click" onclick ="Button1_Click" xmlns:asp =#unknown">

 
<asp:label id="lblOpenid" cssclass="lblOpen" runat="server" text="OpenJobsBySpecificId" xmlns:asp="#unknown">
<asp:textbox id="TextBox1" runat="server" width="78px" xmlns:asp="#unknown">

<asp:button id="Button1" runat="server" text="Click" onclick="Button1_Click" xmlns:asp="#unknown">

推荐答案

u可以使用"asp:requiredfieldvalidator"
然后通过提供文本框的ID来将ControltoValidate属性分配给该文本框.

u can use "asp:requiredfield validator"
and then assign ControltoValidate property to that textbox by giving ID of the textbox.

您好，

这是示例代码

Hello,

Here''s a sample code

<asp:label id="lblOpenid" cssclass="lblOpen" runat="server" text="OpenJobsBySpecificId" xmlns:asp="#unknown">
           <asp:textbox id="TextBox1" runat="server" width="78px" xmlns:asp="#unknown">
           <asp:button id="Button1" runat="server" text="Click" onclick="Button1_Click" xmlns:asp="#unknown" />
           <asp:RequiredFieldValidator ID="reqfTextBox1" Display="None" runat="server" ErrorMessage="Enter Value" ForeColor="red" ControlToValidate="TextBox1" SetFocusOnError="True" CssClass="clsErrorSign" Text="x" Font-Bold="true"></asp:RequiredFieldValidator>
               <ajaxToolkit:ValidatorCalloutExtender ID="vcTextBox1" HighlightCssClass="validatorCalloutHighlight" runat="server" TargetControlID="reqfTextBox1">
                                                                           </ajaxToolkit:ValidatorCalloutExtender>

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