在数据表的标题行上方添加空行

Question

我按照Adding new row to datatable's top 添加了空行，但即使我的索引为 0，它仍然不会在我的数据表的标题上方添加空行。

我试过了

DataRow 空白行 = dt.NewRow(); dt.Rows.InsertAt(blankRow, 0);

这是我的代码

public void filldatagridview(ExcelWorksheet workSheet)
        {
            DataTable dt = new DataTable();

            //Create the data column
            for (int col = workSheet.Dimension.Start.Column; col <= workSheet.Dimension.End.Column; col++)
            {
                dt.Columns.Add(col.ToString());
            }

           for (int row = 12; row <= 26; row++)
            {
                DataRow newRow = dt.NewRow(); //Create a row
                int i = 0;
                for (int col = workSheet.Dimension.Start.Column; col <= workSheet.Dimension.End.Column; col++)
                {
                    newRow[i++] = workSheet.Cells[row, col].Text;
                }
                dt.Rows.Add(newRow);
            }

            dt.Columns.RemoveAt(0); //remove No 
            dt.Columns.RemoveAt(0); //remove article

            //Get BookCode 
            using (SqlConnection conn = new SqlConnection("Server con.."))
            using (SqlCommand cmd = new SqlCommand(null, conn))
            {
                StringBuilder sb = new StringBuilder("SELECT InvtID AS BOOKCODE FROM InventoryCustomer WHERE Barcode In (");

                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    if (i != 0) sb.Append(",");

                    string name = "@P" + i;
                    cmd.Parameters.AddWithValue(name, dt.Rows[i]["3"]);
                    sb.Append(name);
                }
                sb.Append(")");

                cmd.CommandText = sb.ToString();

                SqlDataAdapter da = new SqlDataAdapter(cmd);
                da.Fill(dt);

                dt.DefaultView.Sort = "BOOKCODE";
                dt = dt.DefaultView.ToTable();

                dt.Columns["BOOKCODE"].SetOrdinal(0);

                dataGridView2.DataSource = dt;
            }
}

 private void dataGridView2_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
        }

Answer 1

你可以试试这个。由于 DataTable 为空，添加一行会自动添加到第 0 个索引处：

DataRow row = dt.NewRow();
dt.Rows.Add(row);

或者你可以这样做：

DataRow blankRow = dt.NewRow(); 

for (int temp = 0; temp < 10; temp++)  // here 10 is number of columns
{
    blankRow[temp] = "";  // use appropriate data type,
}
dt.Rows.InsertAt(blankRow, 0);

更新：

在添加数据源之前的 DataBound 事件：

GridViewRow headerRow = new GridViewRow(0, 0, DataControlRowType.Header, DataControlRowState.Normal);

TableHeaderCell headerCell = new TableHeaderCell();
headerCell.Text = "headercol1”;
headerCell.ColumnSpan = 2;
headerRow.Controls.Add(headerCell);

headerCell = new TableHeaderCell();
headerCell.ColumnSpan = 2;
headerCell.Text = "headercol2”;
headerRow.Controls.Add(headerCell);
dataGridView2.HeaderRow.Parent.Controls.AddAt(0, headerRow); 

这假设您有一个包含 4 列的网格视图。我给 headercol1 2 colspace 和 headercol2 2 colspace