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Data source is an invalid type.  It must be either an IListSource, IEnumerable, or IDataSource.

Posted on 2011-03-18
11
Medium Priority
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3,441 Views
Last Modified: 2012-05-11
I have a webpart that I deployed but when I run it, I get the attached Stack Trace:

Below is the code
{
        private bool _error = false;
        private string _myProperty = null;

        SPSite mySite = SPContext.Current.Site;
        SPWeb myWeb;
        SPList myList;

        GridView myGridView = new GridView();
        
        [Personalizable(PersonalizationScope.Shared)]
        [WebBrowsable(true)]
        [System.ComponentModel.Category("My Property Group")]
        [WebDisplayName("MyProperty")]
        [WebDescription("Meaningless Property")]
        public string MyProperty
        {
            get
            {
                if (_myProperty == null)
                {
                    _myProperty = "Hello SharePoint";
                }
                return _myProperty;
            }
            set { _myProperty = value; }
        }


        public WebPartFeature1()
        {
            this.ExportMode = WebPartExportMode.All;
        }

        /// <summary>
        /// Create all your controls here for rendering.
        /// Try to avoid using the RenderWebPart() method.
        /// </summary>
        protected override void CreateChildControls()
        {
            if (!_error)
            {
                try
                {

                    base.CreateChildControls();

                    myWeb = SPContext.Current.Web;
                    myList = myWeb.Lists["HOTLINE"];
                    SPListItemCollection results = myList.Items;

                    //Create the datatable object
                    DataTable table;
                    table = new DataTable();
                    table.Columns.Add("Type", typeof(string));
                    table.Columns.Add("Name", typeof(string));
                    table.Columns.Add("Modified", typeof(string));
                    table.Columns.Add("Modified By", typeof(string));
                    table.Columns.Add("STATUS", typeof(string));
                    table.Columns.Add("PRIORITY CODE", typeof(string));
                    table.Columns.Add("PRIORITY", typeof(string));
                    table.Columns.Add("CASE NUMBER", typeof(string));
                    table.Columns.Add("COMPLETE", typeof(string));

                    //Create the rows for each splistitem
                    DataRow row;
                    foreach (SPListItem result in results)
                    {
                        row = table.Rows.Add();
                        row["Type"] = result["Type"].ToString();
                        row["Name"] = result["Name"].ToString();
                        row["Modified"] = result["Modified"].ToString();
                        row["Modified By"] = result["Modified By"].ToString();
                        row["STATUS"] = result["STATUS"].ToString();
                        row["PRIORITY CODE"] = result["PRIORITY CODE"].ToString();
                        row["PRIORITY"] = result["PRIORITY"].ToString();
                        row["CASE NUMBER"] = result["CASE NUMBER"].ToString();
                        row["COMPLETE"] = result["COMPLETE"].ToString();
                    }

                    myGridView.AutoGenerateColumns = false;
                    myGridView.AllowPaging = true;
                    myGridView.PageSize = 100;

                    BoundField HL_TYPE = new BoundField();
                    HL_TYPE.HeaderText = "TYPE";
                    HL_TYPE.DataField = "TYPE";
                    HL_TYPE.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_TYPE.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_TYPE);

                    BoundField HL_NAME = new BoundField();
                    HL_NAME.HeaderText = "NAME";
                    HL_NAME.DataField = "NAME";
                    HL_NAME.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_NAME.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_NAME);

                    BoundField HL_MODIFIED = new BoundField();
                    HL_MODIFIED.HeaderText = "MODIFIED";
                    HL_MODIFIED.DataField = "MODIFIED";
                    HL_MODIFIED.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_MODIFIED.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_MODIFIED);

                    BoundField HL_MODIFIED_BY = new BoundField();
                    HL_MODIFIED_BY.HeaderText = "MODIFIED BY";
                    HL_MODIFIED_BY.DataField = "MODIFIED BY";
                    HL_MODIFIED_BY.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_MODIFIED_BY.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_MODIFIED_BY);

                    BoundField HL_STATUS = new BoundField();
                    HL_STATUS.HeaderText = "STATUS";
                    HL_STATUS.DataField = "STATUS";
                    HL_STATUS.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_STATUS.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_STATUS);

                    BoundField HL_PRIORITY_CODE = new BoundField();
                    HL_PRIORITY_CODE.HeaderText = "PRIORITY CODE";
                    HL_PRIORITY_CODE.DataField = "PRIORITY CODE";
                    HL_PRIORITY_CODE.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_PRIORITY_CODE.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_PRIORITY_CODE);

                    BoundField HL_PRIORITY = new BoundField();
                    HL_PRIORITY.HeaderText = "PRIORITY";
                    HL_PRIORITY.DataField = "PRIORITY";
                    HL_PRIORITY.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_PRIORITY.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_PRIORITY);

                    BoundField HL_CASE_NUMBER = new BoundField();
                    HL_CASE_NUMBER.HeaderText = "CASE NUMBER";
                    HL_CASE_NUMBER.DataField = "CASE NUMBER";
                    HL_CASE_NUMBER.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_CASE_NUMBER.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_CASE_NUMBER);

                    BoundField HL_COMPLETE = new BoundField();
                    HL_COMPLETE.HeaderText = "COMPLETE";
                    HL_COMPLETE.DataField = "COMPLETE";
                    HL_COMPLETE.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_COMPLETE.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_COMPLETE);


                    // Your code here...
                    this.Controls.Add(new LiteralControl(this.MyProperty));
                }
                catch (Exception ex)
                {
                    HandleException(ex);
                }
            }
        }

        /// <summary>
        /// Ensures that the CreateChildControls() is called before events.
        /// Use CreateChildControls() to create your controls.
        /// </summary>
        /// <param name="e"></param>
        protected override void OnLoad(EventArgs e)
        {
            if (!_error)
            {
                try
                {
                    base.OnLoad(e);
                    this.EnsureChildControls();

                    // Your code here...
                }
                catch (Exception ex)
                {
                    HandleException(ex);
                }
            }
        }
        protected override void Render(HtmlTextWriter writer)
        {
            SPSite mySite = SPContext.Current.Site;
            SPWeb myWeb = SPContext.Current.Web;
            SPList myList = myWeb.Lists["HOTLINE"];

            myGridView.DataSource = myList;
            //spDataSource.List = myList;
            //SPGridView1.DataSource = spDataSource;
            myGridView.DataBind();
            //SPGridView1.DataBind();
            myGridView.RenderControl(writer);
            //SPGridView1.RenderControl(writer);
        }
        /// <summary>
        /// Clear all child controls and add an error message for display.
        /// </summary>
        /// <param name="ex"></param>
        private void HandleException(Exception ex)
        {
            this._error = true;
            this.Controls.Clear();
            this.Controls.Add(new LiteralControl(ex.Message));
        }
    }

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stackTrace.txt
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Comment
Question by:Isaac
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11 Comments
 
LVL 23

Expert Comment

by:wdosanjos
ID: 35167882
I think it should be myGridView.DataSource = myList.Items; in Render, as follows:

        protected override void Render(HtmlTextWriter writer)
        {
            SPSite mySite = SPContext.Current.Site;
            SPWeb myWeb = SPContext.Current.Web;
            SPList myList = myWeb.Lists["HOTLINE"];

            myGridView.DataSource = myList.Items;
            //spDataSource.List = myList;
            //SPGridView1.DataSource = spDataSource;
            myGridView.DataBind();
            //SPGridView1.DataBind();
            myGridView.RenderControl(writer);
            //SPGridView1.RenderControl(writer);
        }

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0
 
LVL 4

Expert Comment

by:abhinayp
ID: 35167900
U cant actually directly use SPList as ur gridview datasource (in line:187).

Bind it this way.

http://nishantrana.wordpress.com/2009/03/23/using-spgridview-to-bound-to-list-data-in-sharepoint/
0
 
LVL 5

Author Comment

by:Isaac
ID: 35191249
wdosonjos,
That did not work.  I get this error:
Error      1      Cannot implicitly convert type 'Microsoft.SharePoint.SPListItemCollection' to 'Microsoft.SharePoint.SPList'      C:\Users\sogunroI\Documents\Visual Studio 2008\Projects\HotWebPartLine\HotWebPartLine\WebPartCode\HotWebPartLine.cs      209      33      HotWebPartLine


abhinayp,
That's what I tried first but then I got this error: Value does not fall within the expected range.

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Web.UI;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Data;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;

namespace HotWebPartLine
{
    [Guid("a51d67cf-bcba-4414-b180-ff90165a4169")]
    public class HotWebPartLine : Microsoft.SharePoint.WebPartPages.WebPart
    {
        private bool _error = false;
        private string _myProperty = null;

        SPSite mySite = SPContext.Current.Site;
        SPWeb myWeb;
        SPList myList;

        SPGridView SPGridView1 = new SPGridView();
        SPDataSource spDataSource = new SPDataSource();


        [Personalizable(PersonalizationScope.Shared)]
        [WebBrowsable(true)]
        [System.ComponentModel.Category("My Property Group")]
        [WebDisplayName("MyProperty")]
        [WebDescription("Meaningless Property")]
        public string MyProperty
        {
            get
            {
                if (_myProperty == null)
                {
                    _myProperty = "Hello SharePoint";
                }
                return _myProperty;
            }
            set { _myProperty = value; }
        }


        public HotWebPartLine()
        {
            this.ExportMode = WebPartExportMode.All;
        }

        /// <summary>
        /// Create all your controls here for rendering.
        /// Try to avoid using the RenderWebPart() method.
        /// </summary>
        protected override void CreateChildControls()
        {
            if (!_error)
            {
                try
                {

                    base.CreateChildControls();
                    
                    myWeb = SPContext.Current.Web;

                    //myWeb = mySite.OpenWeb();

                    myList = myWeb.Lists["Hotline List"];

                    SPListItemCollection results = myList.Items;

 

                    //Create the datatable object

                    DataTable table;

                    table = new DataTable();

                    table.Columns.Add("Type", typeof(string));
                    table.Columns.Add("Case Number", typeof(string));
                    table.Columns.Add("Name", typeof(string));
                    table.Columns.Add("Modified", typeof(string));
                    table.Columns.Add("Modified By", typeof(string));
                    table.Columns.Add("Status", typeof(string));
                    table.Columns.Add("Priority Code", typeof(string));
                    table.Columns.Add("Priority", typeof(string));
                    table.Columns.Add("COMPLETE", typeof(string));

 

                    //Create the rows for each splistitem

                    DataRow row;

                    foreach (SPListItem result in results)

                    {

                        row = table.NewRow();

                        row["Type"] = result["Type"].ToString();
                        row["Case Number"] = result["Case Number"].ToString();
                        row["Name"] = result["Name"].ToString();
                        row["Modified"] = result["Modified"].ToString();
                        row["Modified By"] = result["Modified By"].ToString();
                        row["Status"] = result["Status"].ToString();
                        row["Priority Code"] = result["Priority Code"].ToString();
                        row["Priority"] = result["Priority"].ToString();
                        row["COMPLETE"] = result["COMPLETE"].ToString();
                        table.Rows.Add(row);

                    }

 

                    //SPGridView1 = new SPGridView();

                    SPGridView1.Enabled = true;
                    SPGridView1.AutoGenerateColumns = false;
                    SPGridView1.ID = "hotView"; 

                    SPBoundField HL_TYPE = new SPBoundField();
                    HL_TYPE.HeaderText = "Type";
                    HL_TYPE.DataField = "Type";
                    HL_TYPE.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_TYPE.ItemStyle.Wrap = false;
                    SPGridView1.Columns.Add(HL_TYPE);

                    SPBoundField HL_CASE_NUMBER = new SPBoundField();
                    HL_CASE_NUMBER.HeaderText = "Case Number";
                    HL_CASE_NUMBER.DataField = "Case Number";
                    SPGridView1.Columns.Add(HL_CASE_NUMBER);

                    SPBoundField HL_NAME = new SPBoundField();
                    HL_NAME.HeaderText = "Name";
                    HL_NAME.DataField = "Name";
                    SPGridView1.Columns.Add(HL_NAME);
                    
                    SPBoundField HL_MODIFIED = new SPBoundField();
                    HL_MODIFIED.HeaderText = "Modified";
                    HL_MODIFIED.DataField = "Modified";
                    SPGridView1.Columns.Add(HL_MODIFIED);
                    
                    SPBoundField HL_MODIFIED_BY = new SPBoundField();
                    HL_MODIFIED_BY.HeaderText = "Modified By";
                    HL_MODIFIED_BY.DataField = "Modified By";
                    SPGridView1.Columns.Add(HL_MODIFIED_BY);

                    SPBoundField HL_STATUS = new SPBoundField();
                    HL_STATUS.HeaderText = "Status";
                    HL_STATUS.DataField = "Status";
                    SPGridView1.Columns.Add(HL_STATUS);

                    SPBoundField HL_PRIORITY_CODE = new SPBoundField();
                    HL_PRIORITY_CODE.HeaderText = "Priority Code";
                    HL_PRIORITY_CODE.DataField = "Priority Code";
                    SPGridView1.Columns.Add(HL_PRIORITY_CODE);

                    SPBoundField HL_PRIORITY = new SPBoundField();
                    HL_PRIORITY.HeaderText = "Priority";
                    HL_PRIORITY.DataField = "Priority";
                    SPGridView1.Columns.Add(HL_PRIORITY);

                    SPBoundField HL_COMPLETE = new SPBoundField();
                    HL_COMPLETE.HeaderText = "COMPLETE";
                    HL_COMPLETE.DataField = "COMPLETE";
                    SPGridView1.Columns.Add(HL_COMPLETE);

                    spDataSource.List = myList;
                    SPGridView1.DataSource = spDataSource;
                    SPGridView1.DataBind();

                    this.Controls.Add(new LiteralControl(this.MyProperty));
                }
                catch (Exception ex)
                {
                    HandleException(ex);
                }
            }
        }

        /// <summary>
        /// Ensures that the CreateChildControls() is called before events.
        /// Use CreateChildControls() to create your controls.
        /// </summary>
        /// <param name="e"></param>
        protected override void OnLoad(EventArgs e)
        {
            if (!_error)
            {
                try
                {
                    base.OnLoad(e);
                    this.EnsureChildControls();

                    // Your code here...
                }
                catch (Exception ex)
                {
                    HandleException(ex);
                }
            }
        }

        protected override void RenderContents(HtmlTextWriter writer)
        {
            SPSite mySite = SPContext.Current.Site;
            SPWeb myWeb = SPContext.Current.Web;
            SPList myList = myWeb.Lists["Hotline List"];

            spDataSource.List = myList;
            SPGridView1.DataSource = spDataSource;
            SPGridView1.DataBind();

            SPGridView1.RenderControl(writer);

        }
        /// <summary>
        /// Clear all child controls and add an error message for display.
        /// </summary>
        /// <param name="ex"></param>
        private void HandleException(Exception ex)
        {
            this._error = true;
            this.Controls.Clear();
            this.Controls.Add(new LiteralControl(ex.Message));
        }
    }
}

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LVL 23

Accepted Solution

by:
wdosanjos earned 2000 total points
ID: 35195791
Please try:

        protected override void Render(HtmlTextWriter writer)
        {
            SPSite mySite = SPContext.Current.Site;
            SPWeb myWeb = SPContext.Current.Web;
            SPList myList = myWeb.Lists["HOTLINE"];

            myGridView.DataSource = myList.Items.List;
            //spDataSource.List = myList;
            //SPGridView1.DataSource = spDataSource;
            myGridView.DataBind();
            //SPGridView1.DataBind();
            myGridView.RenderControl(writer);
            //SPGridView1.RenderControl(writer);
        }

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0
 
LVL 5

Author Comment

by:Isaac
ID: 35202008
It rendered data in a gridview to the page but it had extra columns that I've never seen before nor did I create. Ex: Xml,uniquID,RecurrenceID,MissingReuquiredFields,etc.
0
 
LVL 4

Expert Comment

by:abhinayp
ID: 35210277
set AutoGenerateColumns="false" in aspx of the gridview
0
 
LVL 5

Author Comment

by:Isaac
ID: 35232347
it is already false...
0
 
LVL 23

Expert Comment

by:wdosanjos
ID: 35244006
Did it display your data columns along with the extra columns?

Also, I'm not sure how it displayed the extra columns if AutoGenerateColumns is set to false.
0
 
LVL 5

Author Comment

by:Isaac
ID: 35262204
Yes, it still displayed the extra columns
0
 
LVL 23

Expert Comment

by:wdosanjos
ID: 35284585
Please post the definition of your GridView.
0
 
LVL 5

Author Comment

by:Isaac
ID: 35295903
I did with my initial post or are you asking for something else.
myGridView.AutoGenerateColumns = false;
                    myGridView.AllowPaging = true;
                    myGridView.PageSize = 100;

                    BoundField HL_TYPE = new BoundField();
                    HL_TYPE.HeaderText = "TYPE";
                    HL_TYPE.DataField = "TYPE";
                    HL_TYPE.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_TYPE.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_TYPE);

                    BoundField HL_NAME = new BoundField();
                    HL_NAME.HeaderText = "NAME";
                    HL_NAME.DataField = "NAME";
                    HL_NAME.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_NAME.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_NAME);

                    BoundField HL_MODIFIED = new BoundField();
                    HL_MODIFIED.HeaderText = "MODIFIED";
                    HL_MODIFIED.DataField = "MODIFIED";
                    HL_MODIFIED.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_MODIFIED.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_MODIFIED);

                    BoundField HL_MODIFIED_BY = new BoundField();
                    HL_MODIFIED_BY.HeaderText = "MODIFIED BY";
                    HL_MODIFIED_BY.DataField = "MODIFIED BY";
                    HL_MODIFIED_BY.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_MODIFIED_BY.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_MODIFIED_BY);

                    BoundField HL_STATUS = new BoundField();
                    HL_STATUS.HeaderText = "STATUS";
                    HL_STATUS.DataField = "STATUS";
                    HL_STATUS.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_STATUS.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_STATUS);

                    BoundField HL_PRIORITY_CODE = new BoundField();
                    HL_PRIORITY_CODE.HeaderText = "PRIORITY CODE";
                    HL_PRIORITY_CODE.DataField = "PRIORITY CODE";
                    HL_PRIORITY_CODE.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_PRIORITY_CODE.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_PRIORITY_CODE);

                    BoundField HL_PRIORITY = new BoundField();
                    HL_PRIORITY.HeaderText = "PRIORITY";
                    HL_PRIORITY.DataField = "PRIORITY";
                    HL_PRIORITY.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_PRIORITY.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_PRIORITY);

                    BoundField HL_CASE_NUMBER = new BoundField();
                    HL_CASE_NUMBER.HeaderText = "CASE NUMBER";
                    HL_CASE_NUMBER.DataField = "CASE NUMBER";
                    HL_CASE_NUMBER.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_CASE_NUMBER.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_CASE_NUMBER);

                    BoundField HL_COMPLETE = new BoundField();
                    HL_COMPLETE.HeaderText = "COMPLETE";
                    HL_COMPLETE.DataField = "COMPLETE";
                    HL_COMPLETE.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
                    HL_COMPLETE.ItemStyle.Wrap = false;
                    myGridView.Columns.Add(HL_COMPLETE);

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Disaster Recovery as a Service is one go-to solution that revolutionizes DR planning. Implementing DRaaS could be an efficient process, easily accessible to non-DR experts. Learn about monitoring, testing, executing failovers and failbacks to ensure a "healthy" DR environment.

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