当文本为空时，在DataGridView中显示文本

Question

当文本为空时，如何在DataGridView的灰色部分显示文本。

我找到了这个例子，但在VB.net中不起作用

GridView1.EmptyDataText="No Records Found";

Answer 1

EmptyDataText是Web GridView控件的属性。在Windows中，要在DataGridView没有任何行时显示文本，需要自己呈现文本。为此，您可以处理Paint事件的DataGridView并使用TextRenderer.DrawText呈现文本。

C#

private void dataGridView1_Paint(object sender, PaintEventArgs e)
{
    if (dataGridView1.Rows.Count == 0)
        TextRenderer.DrawText(e.Graphics, "No records found.",
            dataGridView1.Font, dataGridView1.ClientRectangle,
            dataGridView1.ForeColor, dataGridView1.BackgroundColor,
            TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter);
}

VB.NET

Private Sub DataGridView1_Paint(sender As Object, e As PaintEventArgs) _
    Handles DataGridView1.Paint
    If DataGridView1.Rows.Count = 0 Then
        TextRenderer.DrawText(e.Graphics, "No records found.",
            DataGridView1.Font, DataGridView1.ClientRectangle,
            DataGridView1.ForeColor, DataGridView1.BackgroundColor,
            TextFormatFlags.HorizontalCenter Or TextFormatFlags.VerticalCenter)
    End If
End Sub