Problem with displaying the value of the selected row in datagridview in the combobox control

Question

Hi  I have a combobox and when clicking on a datagridview row I retrieve the values of the row in the combobox datatimepicker and other controls on the form.... But the combobox.selecteditem doesn't return the correct value. I wrote messagebox.show(Convert.ToString(comboBox1.selectedItem)) and I saw that it returns System.Data.DataGridView . I have this line: comboBox1.SelectedItem =Convert.ToInt32(dataGridView2.SelectedRows[0].Cells[0].Value); but the combobox's value is not changing when clicking on different rows in the datagridview. Can you please help me? Thanks in advance

Vulpes · Answer

It's a bit long-winded but try this instead: int val = Convert.ToInt32(dataGridView2.SelectedRows[0].Cells[0].Value); foreach (DataRowView drv in comboBox1.Items) { if (Object.Equals(drv[comboBox1.DisplayMember] val)) { comboBox1.SelectedItem = drv; break; } }

Vulpes · Answer

'val' isn't in fact a reserved word so I don't know why changing it would have solved the problem. I thought initially that the problem was that no rows were selected which you could have got around with: if (dataGridView1.SelectedRows.Count > 0) { int val = Convert.ToInt32(dataGridView1.SelectedRows[0].Cells[0].Value); foreach (DataRowView drv in comboBox1.Items) { if (Object.Equals(drv[comboBox1.DisplayMember] val)) { comboBox1.SelectedItem = drv; break; } } } Anyway no matter if it's solved :)

Nel · Answer

OK I solved it. The problem was val it is a reserved word I suppose when I changed it it worked. Thanks a lot Vulpes.

Nel · Answer

Now I get an error: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index in the line: int val = Convert.ToInt32(dataGridView2.SelectedRows[0].Cells[0].Value); even though when I insert messagebox for Convert.ToString(dataGridView2.SelectedRows[0].Cells[0].Value) it shows the correct value when clicking on the row in datagridview