How to set default value in DataGridViewComboBox during DataGridViewControl Loading..

Syed1978 · January 23rd, 2009, 10:42 AM

I am using datagridview control in my application. The datagridview control consist of two textbox column and one combobox column,Where combobox is loaded with some set of data in database is working correctly. But the issue is i want to select a default value in the combobox while loading. Please help us to solve the issue.

Bob Bedell · January 24th, 2009, 02:26 PM

Not much detail to work with. Are you using data binding? If so, what sort of object are you binding to? I was doing something similar recently that involved binding to a custom list of custom key/value pair objects that you might find helpful. The combobox simply displays the first item in the list as a default value. The key/value pair objects expose two public properties named (amazingly) Key and Value. After binding the DataGridViewComboBoxColumn to a BindingSource object you can do this:

Code:

private void DisplayFirstItemInComboColumn()
{
 DataGridViewComboBoxColumn column = (DataGridViewComboBoxColumn) 
 LineItemsDataGridView.Columns["Product"];
 for (int x = 0; x <= LineItemsDataGridView.Rows.Count - 1; x++)
 {
    DataGridViewCell cell = LineItemsDataGridView.Rows[x].Cells["Product"];
    if (column.Items.Count > 0)
    {
       cell.Value = (KeyValuePair)column.Items[0];
    }
 }
}

The DataGridViewComboBoxColumn is configured like this:

Code:

this.Products.DataSource = this.ProductListBindingSource;
this.Products.DisplayMember = "Value";
this.Products.HeaderText = "Product";
this.Products.Name = "Product";
this.Products.ValueMember = "Key";

Anyway, you're basically just getting a reference to a DataGridViewCell object, then setting its Value property.

HTH,

Bob