ASP.NET Number validation in Textbox

Only Number validation in Textbox of ASP.NET Using Regular Expression validator
Only numbers can enter into that Textbox

We can use Regular expression validator for this:
In the validation expression property keep ^\d+$.

<asp:TextBox ID=”TextBox1″ runat=”server” Style=”z-index: 100; left: 259px; position: absolute;
top: 283px” ValidationGroup=”check”></asp:TextBox>

<asp:RegularExpressionValidator ID=”RegularExpressionValidator1″ runat=”server” ControlToValidate=”TextBox1″
ErrorMessage=”Please Enter Only Numbers” Style=”z-index: 101; left: 424px; position: absolute;
top: 285px” ValidationExpression=”^\d+$” ValidationGroup=”check”></asp:RegularExpressionValidator>
——-

equivalent telerik control
<telerik:RadNumericTextBox ID=”RadNumericTextBox1″ runat=”server” Type=”Number” NumberFormat-DecimalDigits=”0″>
                        </telerik:RadNumericTextBox>
<asp:RequiredFieldValidator ID=”NumercTextBoxRequiredFieldValidator” runat=”server”
Display=”Dynamic” ControlToValidate=”RadNumericTextBox1″ ErrorMessage=”Please, select an year number!” />
<asp:RangeValidator ID=”NumericTextBoxRangeValidator” runat=”server” ControlToValidate=”RadNumericTextBox1″
ErrorMessage=”Year number should be a non negative less than 50.” Display=”Dynamic”
MaximumValue=”50″ MinimumValue=”0″ Type=”Integer” />