my DataTable has over 1000 columns and I want to display values on the datagridview. Because of the FillWeigth problem I use the following method to fill the gridview,
public bool TransferDataTableToGrid(DataGridView dataGrid, DataTable dataTable)
{
dataGrid.SuspendLayout();
if ((dataGrid != null) && (dataTable != null))
{
dataGrid.Columns.Clear();
dataGrid.AutoGenerateColumns = false;
dataGrid.DataSource = dataTable;
for (int i = 0; i < dataTable.Columns.Count; i++)
{
DataGridViewColumn column = new DataGridViewColumn();
column.Name = dataTable.Columns[i].ColumnName;
column.FillWeight = 1;
column.CellTemplate = new DataGridViewTextBoxCell();
column.ValueType = dataTable.Columns[i].DataType;
dataGrid.Columns.Add(column);
}
for (int i = 0; i < dataTable.Columns.Count; i++)
{
for (int ii = 0; ii < dataTable.Rows.Count; ii++)
{
dataGrid[i, ii].Value = dataTable.Rows[ii][i];
}
}
}
dataGrid.ResumeLayout();
return true;
}
and sometimes I have an effect that my gridview is empty. Only after second execution data is displayed. Do you have any ideas, why...?
Thanks.
我建议使用分页,这意味着您可以在网格下显示约20列带有导航按钮的控件,就像Google或其他应用程序一样,甚至您不是在编写Web应用程序。
Use binding source to fill your grid
SqlDataAdapter adapter = new SqlDataAdapter(database.cmd);
dataSet1.Tables.Clear();
adapter.Fill(dataSet1, "Table");
bs = new BindingSource();
bs.DataSource = dataSet1.Tables["Table"];
dataGridView1.DataSource = bs;
now you dont need to worry about creating columns and fill cells in loops and its much better performance
Well, I solved my problem. With Ivan's suggestion I tried the alternative way to fill data: instead of using DataSource I add new rows manually
foreach (DataRow row in dataTable.Rows)
{
var dataGridRow = new DataGridViewRow();
dataGridRow.CreateCells(dataGrid);
for (int i = 0; i < row.ItemArray.Length; i++)
{
dataGridRow.Cells[i].Value = row.ItemArray[i];
}
dataGrid.Rows.Add(dataGridRow);
}
...and it works - data in dgv is displayed. Thanks!
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