Show default Text in textbox asp.net

you can use this functionality to set default text of textbox

 <asp:TextBox ID="txtMinSearch" runat="server"
            ForeColor="GrayText" Text="Enter property name, address or GENIE ID."
            onClick="if(this.value=='Enter property name, address or GENIE ID.')this.value='';"
            onBlur="if(this.value=='')this.value='Enter property name, address or GENIE ID.';"
            ControlToValidate="txtMinSearch" ClientIDMode="Static">
</asp:TextBox>

if you provide validation on textbox by using its default functionality then you controlToValidate property and in CS you should apply regex for validation.


Regex.IsMatch(txtMinSearch.Text, @"^\d+([,][\s]\d+)*$")