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Complete Code of SharePoint 2007 (MOSS/WSS) Connected Web Parts using IWebPartField Interface

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Here is an example of connectable Webparts using IWebPartField interface. In the Provider Web Part, I have a drop down list box. This Web Part contains a list of categories from Northwind Database-Categories table. In the Consumer Web Part I have enlisted associated products from Products table.

Connection Provider Part:

using System;

using System.Runtime.InteropServices;

using System.Web.UI;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Serialization;

using Microsoft.SharePoint;

using Microsoft.SharePoint.WebControls;

using Microsoft.SharePoint.WebPartPages;

using System.ComponentModel;

using System.Data;

using System.Data.SqlClient;

namespace WPConnectField

{

[Guid("391e3c0b-69b2-471c-ab47-0ca9aa1ecab1")]

public class WPConnectFieldProvider : System.Web.UI.WebControls.WebParts.WebPart, IWebPartField

{

System.Web.UI.WebControls.DropDownList CatList;

int CatListVal = 0;

public int CategoryID

{

get

{

return this.CatListVal;

}

}

[ConnectionProvider("Web part Connection Provider")]

public IWebPartField GetWPConnectFieldProvider()

{

return this;

}

public void GetFieldValue(FieldCallback callback)

{

callback.Invoke(this.CatListVal);

}

public PropertyDescriptor Schema

{

get

{

return TypeDescriptor.GetProperties(this)["Web part Connection Provider"];

}

}

protected override void CreateChildControls()

{

base.CreateChildControls();

CatList = new System.Web.UI.WebControls.DropDownList();

SqlConnection newSqlConnection = new SqlConnection();

SqlCommand newSqlCommand = new SqlCommand("Select CategoryID,CategoryName from categories", newSqlConnection);

newSqlCommand.CommandType = System.Data.CommandType.Text;

newSqlConnection.ConnectionString = "Integrated Security=True;Initial Catalog=Northwind;Data Source=pranab-sec";

newSqlConnection.Open();

CatList.DataValueField = "CategoryID";

CatList.DataTextField = "CategoryName";

CatList.AutoPostBack = true;

CatList.DataSource = newSqlCommand.ExecuteReader();

CatList.DataBind();

CatList.SelectedIndexChanged += new EventHandler(CatList_SelectedIndexChanged);

Controls.Add(CatList);

newSqlConnection.Close();

}

void CatList_SelectedIndexChanged(object sender, EventArgs e)

{

//throw new Exception("The method or operation is not implemented.");

this.CatListVal = int.Parse(this.CatList.SelectedValue);

}

protected override void Render(HtmlTextWriter writer)

{

// TODO: add custom rendering code here.

// writer.Write("Output HTML");

EnsureChildControls();

this.CatList.RenderControl(writer);

}

}

}

Connection Consumer Part:

using System;

using System.Runtime.InteropServices;

using System.Web.UI;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Serialization;

using Microsoft.SharePoint;

using Microsoft.SharePoint.WebControls;

using Microsoft.SharePoint.WebPartPages;

using System.Data;

using System.Data.SqlClient;

namespace WPConnectFieldConsumer

{

[Guid("864ce0eb-a0f1-4d15-8006-5afb21e78f36")]

public class WPConnectFieldConsumercs : System.Web.UI.WebControls.WebParts.WebPart

{

protected int selectedCatID;

protected System.Web.UI.WebControls.DataGrid NewDataGrid;

protected string SqlQuery = "Select ProductID,ProductName,UnitPrice from Products";

[ConnectionConsumer("Web Part Consumer")]

public void GetWPConnectedProviderInterface(IWebPartField connectProvider)

{

FieldCallback callback = new FieldCallback(ReceiveField);

connectProvider.GetFieldValue(callback);

}

public void ReceiveField(object objField)

{

if (objField != null)

{

this.selectedCatID = (int)objField;

if (this.selectedCatID != 0)

this.SqlQuery += " where CategoryID = " + this.selectedCatID.ToString();

}

}

protected override void OnPreRender(EventArgs e)

{

NewDataGrid = new System.Web.UI.WebControls.DataGrid();

SqlConnection newSqlConnection = new SqlConnection();

SqlCommand newSqlCommand = new SqlCommand(this.SqlQuery, newSqlConnection);

newSqlCommand.CommandType = System.Data.CommandType.Text;

newSqlConnection.ConnectionString = "Integrated Security=True;Initial Catalog=Northwind;Data Source=pranab-sec";

newSqlConnection.Open();

NewDataGrid.DataSource = newSqlCommand.ExecuteReader();

NewDataGrid.DataBind();

Controls.Add(NewDataGrid);

newSqlConnection.Close();

newSqlConnection.Dispose();

newSqlCommand.Dispose();

base.OnPreRender(e);

}

protected override void CreateChildControls()

{

base.CreateChildControls();

}

protected override void Render(HtmlTextWriter writer)

{

// TODO: add custom rendering code here.

// writer.Write("Output HTML");

EnsureChildControls();

this.NewDataGrid.RenderControl(writer);

}

}

}

Comments

  1. WEbpart A exposiing an integer
  2. Webpart B recieving integer from web part A
  3. Webpart C recieving integer from web part A   elso exposing 2 integers
  4. WEbpart D reciving values from webpart B i have dont the above two points. useing IWebpartrowProvider interface. but when i deploys the webpart C all the connection options are disabled. Can u please explain. I am stuck here ssumair@gmail.com

  • Anonymous
    September 03, 2007
    Is this working? I have the same exact one and doesn't work for me. Apprecitae your reply. Thanks, Manju

  • Anonymous
    September 03, 2007
    Great piece of work.I had been struggling with this since a long time.However what i want exactly is a bit different. I would like to create 2 webparts( one displaying a drill-down report from SSRS and the other displaying a chart of the same data) and on click of a particular field  in the report I want the chart to be displayed accordingly. It would be of great help if you could solve this problem. maildeepali1@gmail.com

  • Anonymous
    October 07, 2007
    Is there a page creation and editing model in SharePoint WebServices that can be used to create and edit the content of a “publishing” page type? We can do it from the SharePoint SDK, but How would one go about this using the WebService model?

  • Anonymous
    December 26, 2007
    I m not able to filter the second web part. it is not all coming to public void ReceiveField(object objField)        {            if (objField != null)            {                this.selectedCatID = (string)objField;                if (this.selectedCatID != null)                    this.SqlQuery += " where cmp_countrynameid = " + this.selectedCatID.ToString();            }        } method. I made a selection the DropDownList but  the consumer web part is not consuming the selectedIndex id.

  • Anonymous
    January 20, 2008
    Hi Rajesh, This method will be invoked in the Getfieldvalue method of the provider. Try to debug and see if that method is getting executed."connectProvider.GetFieldValue(callback);" is responsible for passing the value

  • Anonymous
    January 20, 2008
    How dow I do if I want to provide and consume multiple values, i.e. a drop down and a string?

  • Anonymous
    January 22, 2008
    I copied the code and deployed the web part, but it's not working as expected, change the dropdownlist, nothing happen

  • Anonymous
    March 04, 2008
    Excelent Usefull for me How can  I send Qutions  to U please give U r mail Id to me

  • Anonymous
    November 10, 2008
    getfieldvalue is not getting invoked at all, nor consumer is notified. should i do any othher specific settings beyond the code for that to work? when i change value in combo, there isnt any call made to the consumer. should i do any other setting beyond the code here?

  • Anonymous
    August 04, 2009
    Is there any samples out there that would allow connecting a IWebPartField to a standard sharepoint list or document library?

  • Anonymous
    July 08, 2010
    Any idea for following post? Instead of Iwebpartfield - I am using IWebPartRow interface ! As per client's requirement, provider webpart renders dynamic fields on the page unlike creating them in the CreateChildControls() method. social.msdn.microsoft.com/.../5667a865-f9b0-430e-81d5-1a42acbe75d2