How to create webpart custom properties in SharePoint 2010

In this article we will be seeing how to create webpart custom properties in SharePoint 2010.

Steps Involved:

• Open Visual Studio 2010.
• Create an "Empty SharePoint Project".
• Right click on the solution and click on Add => New Item.
• Select "Webpart" template from SharePoint 2010 installed templates.
• Entire solution looks like the following
  
  
   
• Replace CustomProperties.cs file with the following code.

using System;using System.ComponentModel;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using Microsoft.SharePoint;using Microsoft.SharePoint.WebControls;

namespace CustomProperties.CustomPropertiesWP
{
    [ToolboxItemAttribute(false)]
    public class CustomPropertiesWP : WebPart    {
        private string _value;
        Label lblResult;
       Button btnClick;

         [System.Web.UI.WebControls.WebParts.WebBrowsable(true),
         System.Web.UI.WebControls.WebParts.WebDisplayName("Enter the Value"),
         System.Web.UI.WebControls.WebParts.WebDescription(""),
         System.Web.UI.WebControls.WebParts.Personalizable(
         System.Web.UI.WebControls.WebParts.PersonalizationScope.Shared),
         System.ComponentModel.Category("anavijai Custom Properties"),
        System.ComponentModel.DefaultValue("")]

          public string _Value
        {
            get { return _value; }
            set { _value = value; }
        }
        protected override void CreateChildControls()
        {
            lblResult = new Label();
            btnClick = new Button();
            btnClick.Text = "Click";
            btnClick.Click += new EventHandler(btnClick_Click);
            this.Controls.Add(lblResult);
            this.Controls.Add(btnClick);
        }

        protected void btnClick_Click(object sender, EventArgs e)
        {
            lblResult.Text = _Value.ToString(); 
        }       
    }
}

• Build and deploy the solution.
• Go to the SharePoint Site =>Site Actions =>Edit Page =>Editing Tools => Insert =>Web Part =>Categories => Custom =>CustomPropertiesWP.
  
  
   
• Click on Add.
• The web part looks like the following with a button.
  
  
   
• Edit the webpart you could see a new custom category in the webpart properties.
  
  
   
• Enter the value and click on Ok.
  
  
   
• In the CustomPropertiesWP click on the button.