How to show validation control's Error messages in Alert box? - asp.net

Question

I am using 4 required field validators,4 regular expression validators and 4 compare validators for 4 text boxes.Is it possible to show error messages
in an alert or message box when validation fails?
If possible please send code sample.
Regards,
NSJ

Answer 1

<form id="form1" runat="server">
<asp:Label ID="lblNameRequired" runat="server" Text="*Name :"></asp:Label>
<asp:TextBox ID="txtNameRequired" runat="server" ValidationGroup="Validation"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidatorName" runat="server" ControlToValidate="txtNameRequired"
Display="None" ErrorMessage="Name is Required" ValidationGroup="Validation"></asp:RequiredFieldValidator>
<br />
<asp:Label ID="lblGenderRequired" runat="server" Text="*Gender :"></asp:Label>
<asp:DropDownList ID="ddlGenderRequired" runat="server" ValidationGroup="Validation">
<asp:ListItem Selected="True" Value="-1">--Select--</asp:ListItem>
<asp:ListItem Value="0">Male</asp:ListItem>
<asp:ListItem Value="1">Female</asp:ListItem>
</asp:DropDownList>
<asp:CompareValidator ID="CompareValidatorGender" runat="server" ControlToValidate="ddlGenderRequired"
Display="None" ErrorMessage="Gender is Required" Operator="NotEqual" ValidationGroup="Validation"
ValueToCompare="-1"></asp:CompareValidator>
<br />
<asp:Label ID="lblValidation" runat="server" Text="Fields marked with * are required"></asp:Label>
<br />
<asp:Button ID="btnValidate" runat="server" Text="Validate Input" ValidationGroup="Validation" />
<br />
<asp:ValidationSummary ID="ValidationSummary1" runat="server" ShowMessageBox="True"
ShowSummary="False" ValidationGroup="Validation" />
</form>
You should use the same ValidationGroup text on all validation controls and add a ValidationSummary with the ValidationGroup and ShowMessageBox="true"

Answer 2

Use the following code , just set the correct messeges that u want :
<asp:ValidationSummary ID="ValidationSummary1" ShowMessageBox ="true"
runat="server" />
<asp:textbox id="txt1" runat="server"></asp:textbox>
<asp:regularexpressionvalidator id="RegularExpressionValidator1" runat="server"
controltovalidate="txt1" errormessage="Please Enter Only Numbers" validationexpression="^[-+]?\d+(\.\d+)?$">
</asp:regularexpressionvalidator>
<asp:requiredfieldvalidator id="RequiredFieldValidator1" runat="server" controltovalidate="txt1"
errormessage="please enter txt1">*</asp:requiredfieldvalidator>
<asp:textbox id="txt2" runat="server"></asp:textbox>
<asp:regularexpressionvalidator id="RegularExpressionValidator2" runat="server"
controltovalidate="txt2" errormessage="Please Enter Only Charcters" validationexpression="^[a-zA-Z\s.]*$">
</asp:regularexpressionvalidator>
<asp:requiredfieldvalidator id="RequiredFieldValidator1" runat="server" controltovalidate="txt2"
errormessage="please enter txt2">*</asp:requiredfieldvalidator>
<asp:textbox id="txt3" runat="server"></asp:textbox>
<asp:requiredfieldvalidator id="RequiredFieldValidator1" runat="server" controltovalidate="txt3"
errormessage="please enter txt3">*</asp:requiredfieldvalidator>
<asp:Button ID="btnok" runat="server" Text="ok"/>

Answer 3

Don't do it. Users hate alert box error messages. It is a horrible UI design. Put the error messages on the form where the user can read them and they stay while the user makes changes or moves on without having to click on an alert box. Especially when there are multiple corrections to be made, they need to be able to read the errors while they make the corrections.

Answer 4

You can use this function
set parameters validation message and Control ID as parameters
protected void PopupMessage(string Msg, Control controlID)
{
ScriptManager.RegisterClientScriptBlock(controlID, controlID.GetType(), "msg", "alert('" + Msg + "');", true);
}
within the button click event you can this function according to your logic
protected void btnok_Click(object sender, EventArgs e)
{
if(TextBox1.Text=="")
PopupMessage("Name is Required", btnok);
}

Answer 5

please follow following code which is useful for me use ShowSummary property to reduce duplication of message into your pannel
<asp:ValidationSummary ID="VS1" ShowMessageBox="true" runat="server" ShowSummary="False" />
<asp:Label ID="lblUsername" runat="server" >User name</asp:Label>
<asp:TextBox ID="txtUserName" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RFV1" runat="server" ControlToValidate="txtUserName" ErrorMessage="Please Select Name" Display="None" SetFocusOnError="True">
</asp:RequiredFieldValidator><br />