I'm losing the characteristics of my datagrid evrytime i do a refresh

g_r_a_robinson · Feb 7, 2004

I am using the ItemDataBound event to format some of the colours in my datagrid depending on the contents of the row, it works great. Problem is if i do a refresh i lose all the changes made by ItemDataBound which I don't want happening. Unless something new has been added to the grid I really don't want to have to re-bind my grid everytime a refresh occurs. For the most part I don't tend to add things to my grid. Is there some way of ensuring that my ItemDataBound changes can remain, maybe in viewstate or something?

Robby · Feb 7, 2004

Are you binding the grid on each postback?

ensure that your page load event has this in it...

Visual Basic:

If not IsPostBack then
     'bind grid here
end if

g_r_a_robinson · Feb 18, 2004

My problem is not a result of binding again i'm just losing the characteristics of ondatabind when i do a refresh

Robby · Feb 18, 2004

Post your code

g_r_a_robinson · Feb 18, 2004

Heres my page_load

C#:

private void Page_Load(object sender, System.EventArgs e)
		{

			String prefix = PathPrefix;
					
			NoteHeader_PNL.BackImageUrl = prefix + "/images/completeNoteHeader.gif";

			Background.Attributes.Add("BackGround", prefix + "/images/background.gif");
			//RowHeaderBar.Attributes.Add("RowHeaderBar", prefix + "/images/barForNotes.gif");
						
			String defaultMode = JobAdder.DefaultNoteAdd;

			if (defaultMode == "normalNoteAdd")
			{
				JobAdderForTheNoteScreen_PNL.Style.Add( "display", "none" );
			}
			
			if (defaultMode == "editForDefault")
			{
				JobAdderForTheNoteScreen_PNL.Style.Add( "display", "none" );
				//JobAdderForTheNoteScreen_PNL.Visible = false;
				NoteHeader_PNL.Visible = true;
				JobAdder.DefaultNoteAdd = null;
			}

			if (JobAdder.Calendar_Checked_Status == true)
			{
				NoteList_LST.Visible = false;
				Calendar_On_Notescreen_PNL.Visible = true;
			}
			
			if (JobAdder.Calendar_Checked_Status == false)
			{
				NoteList_LST.Visible = true;
				Calendar_On_Notescreen_PNL.Visible = false;
			}


			if (IsPostBack)
			{
			}

			else		
			{				
				//Its a regular select existing job
				roleid = links.RoleID;
		
				if (roleid == 1)
				{
					viewMode = JobViewerForAdmin.JobViewMode;
									
					if (viewMode == "view")
					{
						DisplayNotes();
						JobViewerForAdmin.JobViewMode = "";
					}
						
				}
				else
				{
					viewMode = JobWithNoteViewer.JobViewMode;
									
					if (viewMode == "view")
					{
						DisplayNotes();
						JobWithNoteViewer.JobViewMode = "";
					}

				}
			}				

			// First time around, lets populate the list boxes.
			if (!IsPostBack)
			{
				PopulateActionsDropDown();  
			}

				// Otherwise its a basic job add
			else
			{
						
			}


		}







Heres my bind function

private void BindNotes()
		{
			roleid = links.RoleID;
			
			if (roleid == 1)
			{
				userID = links.UserID;//JobViewerForAdmin.UsrID;

				jobID = (int)Session["JobID_By_Session"];
				//jobID = JobViewerForAdmin.JobID;
				if (jobID == 0)    // I put these in here for the add new job section
				{					// that needs to return an update view
					//jobID = (int)ViewState["jobID"];
					jobID = (int)Session["JobID_By_Session"];//JobSystem.JobIDforDefault;
					//JobViewerForAdmin.JobID = 0;//xyz

				}
			}
			else
			{
				userID = links.UserID;
				jobID = (int)Session["JobID_By_Session"];//JobWithNoteViewer.JobID;
				if (jobID == 0)
				{
					jobID = (int)Session["JobID_By_Session"];//JobSystem.JobIDforDefault;
					//JobWithNoteViewer.JobID = 0;//xyz
				}
			}
		
			noteSystem = new NoteSystem();
			noteData = noteSystem.GetNotesByUserAndJobID(userID,jobID);

		// Lets get the note id's and save them in our array for later
			DataTable noteTable = noteData.Tables[NotesData.NOTES_TABLE];

			if (NotesData.FlagUpdateNote != true)
			{
				noteIDList.Clear();
		

				foreach (DataRow noteID in noteTable.Rows)
				{
					int noteid = Int32.Parse(noteID[NotesData.NOTES_ID_FIELD].ToString());
			
					noteIDList.Add(noteid);
					IEnumerator E = arraylist.GetEnumerator();
					E.MoveNext();
				}
			}

			noteView = noteData.Tables[NotesData.NOTES_TABLE].DefaultView;
	
			NoteList_LST.DataSource = noteView;
			NoteList_LST.DataBind();
		}





heres my ItemDataBound event

private void NoteList_LST_ItemDataBound(object sender, System.Web.UI.WebControls.DataListItemEventArgs e)
		{

			String readStatus;
			String bywho;
			//int userID = links.UserID;
			String tmpUserID = userID.ToString();


			ListItemType lit = e.Item.ItemType; 

			if (lit == ListItemType.Item || lit == ListItemType.AlternatingItem)
			{
				readStatus = Convert.ToString(DataBinder.Eval(e.Item.DataItem, NotesData.NOTE_READ_FIELD));
				Button button = e.Item.FindControl("Read_Note_BTN") as Button;

				String Action;
				Action = Convert.ToString(DataBinder.Eval(e.Item.DataItem, NotesData.FK_ACTION_PERFORMED_FIELD));

				Button edit = e.Item.FindControl("Edit_Note_BTN") as Button;
				Label label = e.Item.FindControl("Total_Label") as Label;
				HtmlTableCell header = e.Item.FindControl("RowHeaderBar") as HtmlTableCell;
				HtmlTableCell header_for_system = e.Item.FindControl("RowHeaderBar_For_System") as HtmlTableCell;
				HtmlTableCell header_for_unread = e.Item.FindControl("RowHeaderBar_For_UnRead") as HtmlTableCell;

				header.Visible = false;
				header_for_system.Visible = false;
				header_for_unread.Visible = false;
				
				bywho = Convert.ToString(DataBinder.Eval(e.Item.DataItem, NotesData.FK_USERID_FIELD));
							
				if(bywho == tmpUserID) // The user that logged on created the note
				{
					if(Action != "null")									// Read notes with read button removed
					{														
						header.Visible = true;								// blue bar VISIBLE
						header_for_system.Visible = false;					// grey bar	INVISIBLE
						button.Visible = false;								// They don't need to have read button
						edit.Visible = true;								// This person can edit their own note
						header_for_unread.Visible = false;					// because they created it.

						if (Action == "Comment")
						{
							label.Visible = false;
						}
					}	

					if(Action == "null")									// System notes with read button removed
					{
						e.Item.BackColor = System.Drawing.Color.LightGray;
						button.Visible = false;
						edit.Visible = false;
						label.Visible = false;
						header.Visible = false;
						header_for_system.Visible = true;
						header_for_unread.Visible = false;
					}
					
				}
				
				else			// This user is receiving notes that someone else created
				{
					if(Action != "null" && readStatus != "Read")			// Notes that are unread
					{
						e.Item.BackColor = System.Drawing.Color.IndianRed;
						header.Visible = false;								// blue bar VISIBLE
						header_for_system.Visible = false;					// grey bar INVISIBLE
						button.Visible = true;
						edit.Visible = false;								// This person can't edit this note
						header_for_unread.Visible = true;					// because they didn't create it
						
						if (Action == "Comment")							// This removes totals for comments
						{													// A comment is the only category
							label.Visible = false;							// without a total
						}
					}

					if(Action != "null" && readStatus == "Read" )			// Read notes with read button removed
					{														
						header.Visible = true;								// blue bar VISIBLE
						header_for_system.Visible = false;					// grey bar	INVISIBLE
						button.Visible = false;
						edit.Visible = false;								// This person can't edit this note
						header_for_unread.Visible = false;					// because they didn't create it
						
						if (Action == "Comment")							// This removes totals for comments
						{													// A comment is the only category
							label.Visible = false;							// without a total
						}

					}	

					if(Action == "null" && readStatus != "Read")			// System Notes that are unread
					{
						e.Item.BackColor = System.Drawing.Color.IndianRed;
						button.Visible = true;
						edit.Visible = false;								// Can't edit system notes
						label.Visible = false;
						header.Visible = false;
						header_for_system.Visible = true;
						header_for_unread.Visible = false;

						//RowHeaderBar_For_System.Visible = false;
					}

					if(Action == "null" && readStatus == "Read")			// System notes with read button removed
					{
						e.Item.BackColor = System.Drawing.Color.LightGray;
						button.Visible = false;
						edit.Visible = false;								// Can't edit system notes
						label.Visible = false;
						header.Visible = false;
						header_for_system.Visible = true;
						header_for_unread.Visible = false;
					}
					

				}

			}
		}

heres my html

I could post the whole thing but its nearly a thousand lines long. Hope this doesn't put you off!!

Thanks for your help

[edit]Please use

C#:

 tags [/cs ]: Robby[/COLOR] [/edit]

Robby · Feb 18, 2004

You're not calling BindNotes() from anywhere.

g_r_a_robinson · Feb 18, 2004

sorry i missed this, this is invoke from the page_load:

public void DisplayNotes()
{
if (JobAdder.DefaultNoteAdd == "normalNoteAdd")
{
JobAdderForTheNoteScreen_PNL.Style.Add( "display", "none" );
NoteHeader_PNL.Visible = true;
JobAdder.DefaultNoteAdd = null;
}

else
{
JobAdderForTheNoteScreen_PNL.Style.Add( "display", "block" );
NoteHeader_PNL.Visible = false;
//JobViewerForAdmin.JobID = 0;
}

BindNotes();

}

I'm losing the characteristics of my datagrid evrytime i do a refresh

g_r_a_robinson

Regular

Robby

Ultimate Contributor

g_r_a_robinson

Regular

Robby

Ultimate Contributor

g_r_a_robinson

Regular

Robby

Ultimate Contributor

g_r_a_robinson

Regular