Vb net gridview rowupdating

05-May-2020 07:05 by 9 Comments

Vb net gridview rowupdating

When the Bound Field is in Edit mode, things are a little different.In that case a Text Box is created and added to the Controls collection for the appropriate cell (and it's the only item added to the Controls collection, so it's Controls[0]).

When a Bound Field is displaying data (not in edit mode), the appropriate text is added to the Text property of the appropriate cell.We’re using Linq to SQL to pull data from our database and bind it to the Grid View.We’ll revisit this method when we implement the sorting functionality.Since it’s a Bound Field, the Text Box is going to be Control[0].Once we have a reference to the Text Box, we set the new first name.The important point is not which of these two events call Bind Data, but one of them must or the Grid View will not be updated. When bound using a Data Source ID, the Grid View internally tracks the current Sort Expression and Sort Direction, and those are available through properties with the same names.

When you manually bind the Grid View, this tracking does not occur, so we must implement some mechanism for tracking those values.In both cases, the controls are added to the controls collection for the cell.You can see that in the case of a Template Field, the exact spacing within the control becomes significant, so it’s generally better to get a reference to the control by ID using Find Control than to use the Controls collection.At that point we need to get the new values so we can update the record, which is done slightly differently for the Bound Field and the Template Field.For the Bound Field, we don’t know the ID of the Text Box since it’s autogenerated by the Bound Field, so we obtain a reference to it by getting the first control in the appropriate cell in the edited row.We also need force databinding to occur when then page is loaded, which we’ll handle in Page_Load.

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