How to Refresh the Second WebPart without using Connectable webparts.

This is a requirement in an Interview for one of my friend. First Take two user controls. In First User Control Add the Controls u want and now add the second user control as a control and write the following code in WebPart1.

Procedure:-

Add one Sample Project with Name Sample001. Now Add two Visual WebParts with Names WebPart001 & WebPart002.

In WebPart Ascx Page write the below HTML.

WebPart001 Ascx

<%@ Assembly Name="$SharePoint.Project.AssemblyFullName$" %> <%@ Assembly Name="Microsoft.Web.CommandUI, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %> <%@ Import Namespace="Microsoft.SharePoint" %> <%@ Register Tagprefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WebPart001UserControl.ascx.cs" Inherits="Sample001.WebPart001.WebPart001UserControl" %> <%@ Register src="../WebPart002/WebPart002UserControl.ascx" tagname="WebPart002UserControl" tagprefix="uc1" %> <table width="100%" cellpadding="0" cellspacing="0"> <tr> <td valign="top"> <table cellpadding="0" cellspacing="0"> <tr><td>Enter Employee ID</td><td><asp:TextBox ID="txtEmpID" runat="server"></asp:TextBox></td></tr> <tr><td>Enter Employee Name</td><td><asp:TextBox ID="txtEmpName" runat="server"></asp:TextBox></td></tr> <tr><td colspan="2" align="center"><asp:Button ID="btnSave" Text="Save"         runat="server" onclick="btnSave_Click" /></td></tr> <tr><td colspan="2" align="center"><asp:Label ID="lblErrorMessage" runat="server"></asp:Label></td></tr> </table> </td> <td valign="top"> <div id="divGrid" height="300px" style="scroll:auto;"><uc1:WebPart002UserControl ID="WebPart002UserControl1" runat="server" /></div> </td> </tr> </table>

WebPart001 Ascx Load

using System; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using Microsoft.SharePoint; using Microsoft.SharePoint.WebControls; using System.Security; using WP2=Sample001.WebPart002; namespace Sample001.WebPart001 {     public partial class WebPart001UserControl : UserControl     {         protected void Page_Load(object sender, EventArgs e)         {         }         protected void btnSave_Click(object sender, EventArgs e)         {             try             {                  SPWeb currentWeb = SPContext.Current.Web;                     SPList lst = currentWeb.Lists["Employee"];                     SPListItemCollection myColl = lst.Items;                 SPSecurity.RunWithElevatedPrivileges(delegate()                 {                     SPListItem item = myColl.Add();                     item["EmpID"] = txtEmpID.Text;                     item["EmpName"] = txtEmpName.Text;                     item.Update();                     txtEmpID.Text = "";                     txtEmpName.Text = "";                 });                 SPGridView sgv = (SPGridView)WebPart002UserControl1.FindControl("sgvEmployee");                 sgv.DataSource = myColl.GetDataTable();                 sgv.DataBind();             }             catch (Exception ex)             {                 lblErrorMessage.Text = ex.ToString();             }                   }     } }

WebPart002 Ascx

<%@ Assembly Name="$SharePoint.Project.AssemblyFullName$" %> <%@ Assembly Name="Microsoft.Web.CommandUI, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Register Tagprefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %> <%@ Import Namespace="Microsoft.SharePoint" %> <%@ Register Tagprefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> <%@ Control Language="C#" AutoEventWireup="true" CodeBehind="WebPart002UserControl.ascx.cs" Inherits="Sample001.WebPart002.WebPart002UserControl" %> <table width="100%" cellpadding="0" cellspacing="0"> <tr> <td> <SharePoint:SpGridView ID="sgvEmployee" runat="server" AutoGenerateColumns="false"> <Columns> <asp:BoundField HeaderText="Employee ID" DataField="EmpID" /> <asp:BoundField HeaderText="Employee Name" DataField="EmpName" /> </Columns> </SharePoint:SpGridView> </td> </tr> </table>

WebPart002 Ascx Load

using System; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using Microsoft.SharePoint; using System.Data; namespace Sample001.WebPart002 {     public partial class WebPart002UserControl : UserControl     {         protected void Page_Load(object sender, EventArgs e)         {                        if (!IsPostBack)             {                 getData();             }         }         public void getData()         {             SPWeb currentWeb1 = SPContext.Current.Web;             SPList lst1 = currentWeb1.Lists["Employee"];             SPListItemCollection myColl1 = lst1.Items;             if (myColl1.Count > 0)             {                 sgvEmployee.DataSource = myColl1.GetDataTable();                 sgvEmployee.DataBind();             }         }     } }