winform的datagridview单元格输入限制和右键单击datagridview单元格焦点跟着改变

在datagridview的EditingControlShowing事件里面添加代码:

if (this.dgv_pch.Columns[dgv_pch.CurrentCell.ColumnIndex].HeaderText == "批内序号")//判断是哪列的单元格需要限制
{
(dgv_pch.Columns[dgv_pch.CurrentCell.ColumnIndex] as DataGridViewTextBoxColumn).MaxInputLength = 4;//限制只能输入内容长度为4
e.Control.KeyPress += new KeyPressEventHandler(EditingControl_KeyPress);//限制只能输入数字
//e.Control.KeyPress -= new KeyPressEventHandler(EditingControl_KeyPress);
}

//限制只能输入数字和.和backspace
private void EditingControl_KeyPress(object sender, KeyPressEventArgs e)
{
int keyValue = (int)e.KeyChar;
if ((keyValue >= 48 && keyValue <= 57) || keyValue == 8 || keyValue == 46)
{
if (sender != null && sender is TextBox && keyValue == 46)
{
if (((TextBox)sender).Text.IndexOf(".") >= 0)
e.Handled = true;
else
e.Handled = false;
}
else
e.Handled = false;
}
else
e.Handled = true;
}

//只能输入数字和backspace

private void EditingControl_KeyPress(object sender, KeyPressEventArgs e)
{
if (Convert.ToInt32(e.KeyChar) == 8)
{
e.Handled = false;
}
else
{
Regex numRegex = new Regex(@"^(-?[0-9])$"); // 匹配正则表达式
Match result = numRegex.Match(Convert.ToString(e.KeyChar));
if (result.Success) // 输入的不是数字
{
e.Handled = false; // textBox内容不变
}
else
{
e.Handled = true; // 将现在textBox的值保存下来
}
}
}

//右键单击datagridview的单元格,单元格焦点跟着改变

//在datagridview的CellMouseDown事件里面写

/// <summary>
/// 右键单击datagridview的单元格焦点跟着改变
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void dataGridView_book_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
{
if (e.RowIndex >= 0)
{
if (e.Button == System.Windows.Forms.MouseButtons.Right)
{
dataGridView_book.ClearSelection();
dataGridView_book.Rows[e.RowIndex].Cells[e.ColumnIndex].Selected = true;

}
}
}