RE: Data error DataGridView DataGridViewComboBoxColumn

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Hi,

I performed a test based on your sample code but didn't reproduce the
problem on my side.

I create a WinForm application project and add a DataGridView on the form.
The following is the code in the form.

public partial class Form1 : Form
{
List<ViewData> m_DataList;
private void Form1_Load(object sender, EventArgs e)
{
DataSet regions = new DataSet("Regions");
DataSet territories = new DataSet("Territories");

DataTable regiontable = new DataTable();
DataColumn col = new DataColumn("RegionID", typeof(int));
regiontable.Columns.Add(col);
col = new DataColumn("RegionDescription");
regiontable.Columns.Add(col);
regions.Tables.Add(regiontable);

DataTable territorytable = new DataTable();
col = new DataColumn("TerritoryID", typeof(int));
territorytable.Columns.Add(col);
col = new DataColumn("TerritoryDescription");
territorytable.Columns.Add(col);
col = new DataColumn("RegionID", typeof(int));
territorytable.Columns.Add(col);
territories.Tables.Add(territorytable);

DataRow row = regions.Tables[0].NewRow();
row[0] = 3;
row[1] = "region 3";
regions.Tables[0].Rows.Add(row);

row = regions.Tables[0].NewRow();
row[0] = 2;
row[1] = "region 2";
regions.Tables[0].Rows.Add(row);


row = territories.Tables[0].NewRow();
row[0] = 44122;
row[1] = "terri 44122";
row[2] = 3;
territories.Tables[0].Rows.Add(row);

row = territories.Tables[0].NewRow();
row[0] = 53404;
row[1] = "terri 53404";
row[2] = 3;
territories.Tables[0].Rows.Add(row);

row = territories.Tables[0].NewRow();
row[0] = 60601;
row[1] = "terri 60601";
row[2] = 2;
territories.Tables[0].Rows.Add(row);

row = territories.Tables[0].NewRow();
row[0] = 94105;
row[1] = "terri 94105";
row[2] = 2;
territories.Tables[0].Rows.Add(row);

this.RegionsColumn.DataSource = regions.Tables[0];
this.RegionsColumn.DisplayMember = "RegionDescription";
this.RegionsColumn.ValueMember = "RegionID";

this.TerritoriesColumn.DataSource = territories.Tables[0];
this.TerritoriesColumn.DisplayMember = "TerritoryDescription";
this.TerritoriesColumn.ValueMember = "TerritoryID";

m_DataList = new List<ViewData>();
m_DataList.Add(new ViewData(3, 44122));
m_DataList.Add(new ViewData(3, 53404));
m_DataList.Add(new ViewData(2, 60601));
m_DataList.Add(new ViewData(2, 94105));

dataGridView1.AutoGenerateColumns = false;
dataGridView1.DataSource = m_DataList;
dataGridView1.Columns[0].DataPropertyName = "RegionID";
dataGridView1.Columns[1].DataPropertyName = "TerritoryID";
}
}
public class ViewData
{
private int m_Region;
private int m_Territory;

public ViewData(int Region, int Territory)
{
m_Region = Region;
m_Territory = Territory;
}

public int RegionID
{
get { return m_Region; }
set { m_Region = value; }
}

public int TerritoryID
{
get { return m_Territory; }
set { m_Territory = value; }
}
}
}

If possible, could you please create a simple project that could just
reproduce the problem and send it to me? To get my actual email address,
remove 'online' from my displayed email address.

I look forward to your reply!

Sincerely,
Linda Liu
Microsoft Online Community Support

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