C# Winform的DataGridView中的chckbox如何全选，单选，多选

点击表头进行全选，在DataGridView中的单击事件写一下代码，

private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
if (e.RowIndex == -1)//如果单击列表头，全选．
{
int i;
for (i = 0; i < this.dataGridView1.RowCount; i++)
{
this.dataGridView1.Rows[i].Cells[0].Value = "true";//如果为true则为选中,false未选中
}
}
}

多选，在DataGridView的点击单元格内容的单击事件写一下代码，如果只要求单选而不多选的话，则将注释掉的那几行代码去掉注释

private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
try
{
int index = dataGridView1.CurrentRow.Index;
this.dataGridView1.Rows[e.RowIndex].Selected = true;
if (Convert.ToBoolean(dataGridView1.Rows[index].Cells[0].Value))
{
dataGridView1.Rows[index].Cells[0].Value = false;
}
else
{
dataGridView1.Rows[index].Cells[0].Value = true;
////其他的都是false
//for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
//{
//    if (i != index)
//    {
//        dataGridView1.Rows[i].Cells[0].Value = false;
//    }
//}
}
}
catch
{

}
}

将选中的一行或多行数据从DataGridView放到datatable中，然后进行打印

DataGridViewCheckBoxCell checkCell;
private void btnPrint_Click(object sender, EventArgs e)
{
try
{
DataTable dt = new DataTable();
dt.Columns.AddRange(new DataColumn[] {
new DataColumn("id",typeof(Int32)),
new DataColumn("cinvname",typeof(string)),
new DataColumn("cinvstd",typeof(string)),
new DataColumn("supplier",typeof(string)),
new DataColumn("weight",typeof(string)),
new DataColumn("orderNo",typeof(string)),
new DataColumn("producteddate",typeof(string)),
new DataColumn("mocode",typeof(string)),

aee0
new DataColumn("supplierbatchno",typeof(string)),
new DataColumn("packno",typeof(string)),
new DataColumn("qty",typeof(string))

});

for (int i = 0; i < dataGridView1.Rows.Count; i++)
{

checkCell = (DataGridViewCheckBoxCell)dataGridView1.Rows[i].Cells["Column1"];

if (Convert.ToBoolean(checkCell.Value) == true)
{

DataRow dr = null;
dr = dt.NewRow();
//将选中的一行数据转换到datatable中
dr["id"] = Convert.ToString(dataGridView1.Rows[i].Cells["id"].Value);
dr["cinvname"] = Convert.ToString(dataGridView1.Rows[i].Cells["cinvname"].Value);
dr["cinvstd"] = Convert.ToString(dataGridView1.Rows[i].Cells["cinvstd"].Value);
dr["supplier"] = Convert.ToString(dataGridView1.Rows[i].Cells["supplier"].Value);
dr["weight"] = Convert.ToString(dataGridView1.Rows[i].Cells["weight"].Value);
dr["orderNo"] = Convert.ToString(dataGridView1.Rows[i].Cells["orderNo"].Value);
dr["producteddate"] = Convert.ToString(dataGridView1.Rows[i].Cells["producteddate"].Value);
dr["mocode"] = Convert.ToString(dataGridView1.Rows[i].Cells["mocode"].Value);
dr["supplierbatchno"] = Convert.ToString(dataGridView1.Rows[i].Cells["supplierbatchno"].Value);
dr["packno"] = Convert.ToString(dataGridView1.Rows[i].Cells["packno"].Value);
dr["qty"] = Convert.ToString(dataGridView1.Rows[i].Cells["qty"].Value);
dt.Rows.Add(dr);
LoginUser bll = new LoginUser();
string id = dr["id"].ToString();
bll.UptIsExcel(id);

}

}//for
LoginUser bl = new LoginUser();
DataTable dt2 = bl.selectIsExcel();
this.dataGridView1.DataSource = dt2;
PreviewColorReport(dt, "标签打印模板.frx");

}
catch (Exception ex)
{
MessageBox.Show("异常信息：" + ex.Message, "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}