表，SQL C＃通过在datagridview中选择一行将数据添加到“ FK表”

Question

I have 2 tables that have a Datagridview , I want the second datagridview to fill up with data depending on which row that is selected on the first datagridview . I also want to filter it after Column , Name , etc.

(Add data to the second table in relation to first ID) So I established a relation between these tables with pk and fk . I want to add Data to the second table by selecting value from the first table(by datagridview)

Answer 1

I always do following

1. I have an ID column (could be invisible) in the main DataGridView

2. I use CellClick event to fire a LoadDetail() sub

3. In the LoadDetail() sub I use DataGridView1.SelectedRows(0).Cells("ID").value parameter (providing your DGW is in FullRowSelect mode), but you could also pass it as a parameter (Me.DataGridView1.rows(e.RowIndex).Cells("ID").value) in the above CellClick event function.

4. LoadDetail() is a standalone sub which loads detailed data for the selected row depending on the selected row or given parameter. This way, it can also be used for a "Refresh" button or for automatic updates, ie after saving changes.

If you wanted to update the second DataGridView based on shifting rows by arrows, you have to use KeyUp in a similar fashion.

The FK can help in the SQL query, but I think is not important for the way you handle loading of the second DataGridView.