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Hi, now at school we are learning how to use GridView. We have a table with all the information of all the users. When we want to update a row, we need to store name, last name and other data in separate variables. Our teacher does it this way:

C#
GridViewRow changedRow = GridView1.Rows[e.RowIndex];
string firstName = ((TextBox)changedRow.Cells[1].Controls[0]).Text;


What I have tried:

I don't understand what are (TextBox) and Controls[0]? What do they do? What are they used for?
Posted
Updated 8-Mar-23 0:03am

1 solution

C#
GridViewRow changedRow = GridView1.Rows[e.RowIndex];
string firstName = ((TextBox)changedRow.Cells[1].Controls[0]).Text;

changedRow : select the row in GridView1 at the offset in e.RowIndex
Select the control at changedRow.Cells[1].Controls[0]. That is select the second cell in the row item. That cell (I assume) contains a number of controls, so you are selecting the first one (offsets start at zero). You then tell the compiler to assume that the resulting object is a TextBox type. This is known as casting and will only work if the control at that point actually is a TextBox or something derived from it.

But these are basic C# concepts which you should have been taught first. I suggest you have a chat with your teacher about this.
 
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Comments
Mike Radunski 8-Mar-23 6:07am    
Thank you very much
Richard MacCutchan 8-Mar-23 6:22am    
You are welcome.

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