Validators Control to allow only Integers

Here are few different ways you can use native .NET validation controls to validate to allow only integers. We can do it in two ways one by using regular expression and one with compare validators

Method 1: Compare Validator

<asp:TextBox ID="NewMobileTextBox" runat="server" Width="280px" autocomplete="off"
  CssClass="signuptxtbox" ></asp:TextBox>
 <asp:RequiredFieldValidator ID="NewMobileRequired" runat="server" ControlToValidate="NewMobileTextBox"
 CssClass="failureNotification" Display="Dynamic" ErrorMessage="New Mobile is required."  ToolTip="New Mobile is required." ValidationGroup="ChangeNewMobileValidationGroup">*</asp:RequiredFieldValidator>
<asp:CompareValidator ID="NewMobileCompare" runat="server" ControlToValidate="NewMobileTextBox" CssClass="failureNotification" Display="Dynamic" Operator="DataTypeCheck" ErrorMessage="Mobile Number should be numeric only." ValidationGroup="ChangeNewMobileValidationGroup" Type="Integer">*</asp:CompareValidator>

Method 2: Regular Expression Validator

<asp:TextBox ID="NewMobileTextBox" runat="server" Width="280px" autocomplete="off"
CssClass="signuptxtbox" ></asp:TextBox><asp:RequiredFieldValidator ID="NewMobileRequired" runat="server" ControlToValidate="NewMobileTextBox"
CssClass="failureNotification" Display="Dynamic" ErrorMessage="New Mobile is required." ToolTip="New Mobile is required." ValidationGroup="ChangeNewMobileValidationGroup">*</asp:RequiredFieldValidator>
<asp:RegularExpressionValidator ID="mobileRGEX" runat="server" 
ControlToValidate="NewMobileTextBox" CssClass="failureNotification"  
ErrorMessage="Please Enter Only Numbers" ValidationExpression="^\d+$" 
ValidationGroup="ChangeNewMobileValidationGroup"></asp:RegularExpressionValidator>