[Solved] Range Validation in asp.net [closed]

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For making field MANDATORY:

Use RequiredFieldValidator:

<asp:TextBox ID="txtName" runat="server"></asp:TextBox> 

    <asp:RequiredFieldValidator  
         ID="RequiredFieldValidator1"  
         runat="server"  
         ControlToValidate="txtName"  
         ErrorMessage="Input Country!"  
         EnableClientScript="true"  
         SetFocusOnError="true"  
         Text="*"> 
</asp:RequiredFieldValidator>

For Validating Range of Number in TextBox use RangeValidator:

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

<asp:RangeValidator ID="RangeValidator1" runat="server" ControlToValidate="TextBox1" MaximumValue="200" MinimumValue="100" Type="Integer" ErrorMessage="Please input between 100 to 200.">  
</asp:RangeValidator>

Read more about Validations Here

Hope this helps you!

2

solved Range Validation in asp.net [closed]