Question

I have a TreeView Control (that should look like this)

But I don’t know how to populate it with my query:

SELECT T.TableName, C.Column_Name FROM Information_Schema.Tables T
INNER JOIN Information_Schema.Columns C
 ON T.TableName= C.TableName
WHERE T.TableName IN('BASE_TABLE', 'BASE TABLE')
ORDER BY 1, C.Ordinal_Position

Can anyone help me please…

Thanks.

Edit
This is what I tried, but just the table names…

private void PopulateTreeView()
{
    SqlCeCommand cmd = new SqlCeCommand();
    try
    {
        using (SqlCeConnection conn = new SqlCeConnection("Data Source=" + connString))
        {            
            cmd.CommandType = CommandType.Text;
            cmd.CommandText = "SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES";
            conn.Open();
            cmd.Connection = conn;
            cmd.ExecuteNonQuery();
            // Don't know what's next...
        }
    }
    catch (Exception x)
    {
        MessageBox.Show(x.GetBaseException().ToString(), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
    }
    finally
    {
        cmd.Dispose();
    }
}

Answer 1

Here’s a non-LINQ answer that does something simmilar:

using (var conn = new SqlCeConnection(connectionString))
using (var cmd = conn.CreateCommand())
{
    cmd.CommandType = CommandType.Text;
    cmd.CommandText = @"
SELECT T.TABLE_NAME, C.COLUMN_NAME
FROM INFORMATION_SCHEMA.TABLES T
INNER JOIN INFORMATION_SCHEMA.COLUMNS C
ON T.TABLE_NAME= C.TABLE_NAME
WHERE T.TABLE_NAME IN('BASE_TABLE', 'BASE TABLE')
ORDER BY 1, C.ORDINAL_POSITION";
    conn.Open();
    cmd.Connection = conn;
    using (var reader = cmd.ExecuteReader())
    {
        string lastTable = null;
        TreeNode tableNode = null;
        while (reader.Read()) { 
            if (lastTable != reader.GetString(0)) {
                lastTable = reader.GetString(0);
                tableNode = new TreeNode(lastTable);
                myTree.Nodes.Add(tableNode);
            }
            tableNode.ChildNodes.Add(new TreeNode(reader.GetString(1)));
        }
    }
}