January 6th, 2010, 06:27 AM
Dynamically added cells in gridview lose controls on RowUpdating event
I'm quite new to the C# combo with ASP.NET, so i'll try to be as clear as i can with my explanation.
I'm using a GridView to display some columns and rows that reside in a database. This works excellent. Because i wanted to add columns dynamically out of a List of names. Let's say we have a list with 5 names in it, then it dynamically creates a column for every name in the GridView. Here's some code to display what i do:
There's some other stuff in there that isn't important. The ShowDataInGrid looks as following:
protected void Page_Load(object sender, EventArgs e)
//Create columns for each student
List<Student> allStudents = new Eetlijst.Business.Students().GetAll();
foreach (Student student in allStudents)
StudentBoundField studentField = new StudentBoundField();
studentField.HeaderText = student.Naam;
How do i create the dynamic columns for each row? I create them with a DataBound event. So when the GridView databinds, the columns get filled with data. There is also a check inside to see if the row is in edit mode or not. So when i click on the edit button next to the row, the row goes perfectly in edit mode. The code i made adds a TextBox control to the cell. When i fill in a value and press the Update button, it can't find any controls anymore and therefore i can't get the value i entered. The control is still there in the DataBound when i put a break point after it. But as soon as i click the Update button, all the controls of the cells are gone.
public void ShowDataInGrid(int maand, int jaar)
List<Maaltijd> allMaaltijden = new Eetlijst.Business.Maaltijden().GetByMonthAndYear(maand, jaar);
MaaltijdGrid.DataSource = allMaaltijden;
I searched on the internet and all i found is that it has something to do with the application firing a postback before it reaches the RowUpdating method.
So, how can i let the controls exist that i added to the cell when it is in edit mode?
If anyone needs the code that's inside the DataBound event i'll post it.
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