UserControl

Question

How to use the Usercontrol in Windows form application c# and what is its benifits Give me some Idea and links ... I want to learn more About user controls

Satyapriya Nayak · Answer

Hi Rashmi To create an instance of a user control programmatically In the user control be sure that the @ Control directive contains a ClassName attribute that assigns a class to the user control. The following example sets the ClassName attribute to strongly type a user control. Copy In the page where you want to work with the user control create a reference to the user control with the @ Reference directive. When you create the user control programmatically the strong type for your user control is available to the ASP.NET Web page only after you have created a reference to it. For example the following code creates a reference to a user control created in the MyUserControl.ascx file. Copy Create an instance variable for the user control using the control's class name. The class will be part of the ASP namespace. For example if you want to create an instance of the user control declared as class Spinner you use syntax such as the following: VB Copy Protected Spinner1 As ASP.Spinner C# Copy Protected ASP.Spinner Spinner1; Create an instance of the user control in code by calling the LoadControl method. Assign property values as necessary and then add the control to the ControlCollection collection of a container on the page such as a PlaceHolder control. The following example shows an ASP.NET Web page that loads a user control programmatically. The page includes an @ Reference directive to specify the control's file. The LoadControl method reads the file and instantiates it as a control that can be added to the page. C# VB Copy private ASP.Spinner Spinner1 protected void Page_Load(object sender EventArgs e) { Spinner1 = (ASP.Spinner)LoadControl(~/Controls/Spinner.ascx); } protected void Button1_Click(object sender EventArgs e) { PlaceHolder1.Controls.Add(Spinner1); } Load User Control Programmatically Text=Click to Add User Control OnClick=Button1_Click /> Also Please refer the below links http://msdn.microsoft.com/en-us/library/c0az2h86.aspx http://www.c-sharpcorner.com/uploadfile/jayendra/how-to-create-user-control-in-Asp-Net/ http://msdn.microsoft.com/en-us/library/26db8ysc(v=vs.85).aspx http://asp.net-tutorials.com/user-controls/using/ Thanks