Dynamically Add AJAX Control Toolkit ValidatorCallout Extender in Asp.net
Hi, Today we will learn about adding Ajax Control ToolKit ValidatorCallout. we can find the Ajax Control ToolKit ValidatorCallout control in ajax controls list from Toolbox in asp.net.
Here we tack an example add Ajax Control ToolKit ValidatorCallout in asp.net. we will display current time and date on web forms in asp.net.To add Ajax Control ToolKit ValidatorCallout we need one TextBox and RequiredFieldValidator.
Now I am creating all controls that are adding dynamically. For more information, see ValidatorCallout control.
first, we design the asp.net web forms like below:
using System;
using System.Collections.Generic;
using System.Linq; using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
public partial class Default2 : System.Web.UI.Page
{ protected void Page_Load(object sender, EventArgs e)
{
//Dynamically Creating TextBox
TextBox txtBox = new TextBox();
txtBox.ID = "TextBox1";
txtBox.MaxLength = 100;
//Dynamically Creating RequiredFieldValidator Control
RequiredFieldValidator requiredFieldValidater = new RequiredFieldValidator();
requiredFieldValidater.ID = "RequiredFieldValidator1";
requiredFieldValidater.ControlToValidate = txtBox.ID;
requiredFieldValidater.ErrorMessage = "Name is required.";
requiredFieldValidater.Text = "*";
//Dynamically Creating ValidatorCalloutExtender Control
AjaxControlToolkit.ValidatorCalloutExtender validatorCalloutExtender = new AjaxControlToolkit.ValidatorCalloutExtender();
validatorCalloutExtender.ID = "ValidatorCalloutExtender1";
validatorCalloutExtender.TargetControlID = requiredFieldValidater.ID;
//Dynamically Adding controls to PlaceHolder Control
PlaceHolder1.Controls.Add(txtBox);
PlaceHolder1.Controls.Add(requiredFieldValidater);
PlaceHolder1.Controls.Add(validatorCalloutExtender);
}
}
//////////////////Design Page … Save it as timer.aspx
//////////////////
Output Sample:
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