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How to use ASP.NET requiredfieldvalidator in autocomplete control?

Platform: ASP.NET Web Forms |
Control: AutoComplete

The RequiredFieldValidator control ensures that the corresponding field is not left empty on Form submission. It is generally tied to a text box to force input into the text box.

To use ASP.NET RequiredFieldValidator with Autocomplete control, set the ID of the Autocomplete as the value of the ControlToValidate property of the validator.


<ej:Autocomplete ID="searchCustomer" runat="server" Width="100%" DataTextField="ComponentName" DataUniqueKeyField="ComponentId" WatermarkText="Search a customer"></ej:Autocomplete>
     <asp:RequiredFieldValidator runat="server" ID="RequiredFieldValidator1" ControlToValidate="searchCustomer" ErrorMessage="Select an item" ></asp:RequiredFieldValidator>
    <asp:Button runat="server" ID="Button1" Text="Submit" OnClick="Button1_Click" /><br />
    <asp:Label runat="server" ID="Label1"></asp:Label>



protected void Page_Load(object sender, EventArgs e)
            this.searchCustomer.DataSource = "http://mvc.syncfusion.com/UGOdataServices/Northwnd.svc/";
            this.searchCustomer.Query = "ej.Query().from('ComponentLists').select('ComponentId', 'ComponentName')";
        protected void Button1_Click(object sender, EventArgs e)
            Label1.Text = "Autocomplete controls validated";


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Nov 08, 2018



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