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Editorial Team
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Asked: 2026-05-13T19:08:19+00:00

I would like to raise error by myself and use reqularexpressionvalidator to show it’s

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I would like to raise error by myself and use reqularexpressionvalidator to show it’s text. (My idea is to reuse this control.) I don’t remember what property should I use, and what to assign to show the message from control. Can anybody help me please?
How to raise error for this control from code?

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1 Answer

  1. Editorial Team

    probably it is ErrorMessage

    ErrorMessage="Please enter a 4 digit number!"

    or with more details, use this syntax

        <asp:TextBox runat="server" id="txtNumber" />
    <asp:RegularExpressionValidator id="accessID"
    ControlToValidate = "ID of input control to validate"
    ValidationExpression = "the regular expression pattern to test against"
    ErrorMessage = "message to display in ValidationSummary control"
    Text = "message to display in control"
    ForeColor = "color value"
    BackColor = "color value"
    runat="server" />
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