很控件的ValidationGroup 的属性，以前没注意
原来是不同按钮响应不同的验证控件
<html>
<body>
<form runat="server">
<h3>BaseValidator ValidationGroup Example</h3>
Please enter your name:<br/>
<asp:textbox id="NameTextBox"
runat="server"/>
<asp:requiredfieldvalidator id="NameTextBoxRequiredValidator"
controltovalidate="NameTextBox"
display="Dynamic"
text="Please enter your name."
validationgroup="UserInfoGroup"
runat="server"/>
<br><br>
<asp:button id="SubmitButton"
text="Submit"
validationgroup="UserInfoGroup"
runat="server"/>
<hr/>
Please enter a search topic:<br/>
<asp:textbox id="SearchTextBox"
runat="server"/>
<asp:requiredfieldvalidator id="SearchTextBoxRequiredValidator"
controltovalidate="SearchTextBox"
display="Dynamic"
text="Please enter a topic."
validationgroup="SearchGroup"
runat="server"/>
<br><br>
<asp:button id="SearchButton"
text="Search"
validationgroup="SearchGroup"
runat="server"/>
</form>
</body>
</html>
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