I need to know the original type of each column in my DataGridView.
It is bound with a dynamic SQL select, say, "SELECT * FROM artists;"
I want to add a form view of the data above the grid and am programmtically creating Labels and TextBoxes and then some to hold the fields. I add them to a FlowLayoutPanel but I would like to adapt the sizes, especially the multiline property and the height to accomodate long comment and description fields of say 200-500 characters.
All I found when looking into the text columns was datatype string
.
I know I can look up the columns by querying the systables, but it would be nice to find the original datatype a bit closer than that; also I'm using MYSQL atm, and a solution that doesn't need to query the database would hopefully also be DBMS independent.
Edit 1
I fill the DGV with nothing fancy:
DBDA = new MySqlDataAdapter(sql, DBC);
MySqlCommandBuilder cb = new MySqlCommandBuilder(DBDA);
DBDS = new DataSet(ddlb_tables.Text);
DBDA.FillSchema(DBDS, SchemaType.Mapped); //<- This was the missing piece of code!!
DBDA.Fill(DBDS, ddlb_tables.Text);
dataGridView1.DataSource = DBDS;
dataGridView1.DataMember = ddlb_tables.Text;
Edit 2
With the help of the accepted answer (DBDA.MissingSchemaAction
) I could solve my problem. Here is the resulting function in its first, raw version:
public int getColumnSize(DataGridViewColumn dc)
{
try
{
DataGridView DGV = dc.DataGridView;
DataSet DS = (DataSet)DGV.DataSource;
DataTable DT = DS.Tables[0];
DataColumn DC = DT.Columns[dc.Name];
return DC.MaxLength;
} catch { }
return -1;
}
Not getting the original type is not a problem, as long as I know the length of the fields.