从ASP.NET C＃中的gridview中选择时，检索并存储数据库中的复选框值？

Question

我有一个包含CheckBox的GridView，它显示学生的出勤信息。 当我检查CheckBox时，该值（是位值）不会存储在数据库中。

这是我的代码：

protected void btn_attendence_Click(object sender, EventArgs e)
{
    con = [CONNECTION STRING];
    cn = new SqlConnection(con);
    cn.Open();
    foreach (GridViewRow gvrow in grid_attendence.Rows)
    {
        CheckBox chk = ((CheckBox)grid_attendence.FindControl("chbox") as CheckBox);
        if (chk.Checked)
        {
            st = "insert into atd(attend,stno,stname) values ('" + gvrow.Cells[0].Text + "','" + gvrow.Cells[1].Text + "','" + gvrow.Cells[2].Text + "')";

            cmd = new SqlCommand(st, cn);
            cmd.ExecuteNonQuery();
            Response.Write("Record inserted");
            cn.Close();
        }
    }
}

Answer 1

通过(CheckBox)gvrow更改(CheckBox)grid_attendence (CheckBox)gvrow

foreach (GridViewRow gvrow in grid_attendence.Rows)
{
    var chk = (CheckBox)gvrow.FindControl("chbox");
    if (chk.Checked)
    {
        st = "insert into atd(attend,stno,stname) values ('" + gvrow.Cells[0].Text + "','" + gvrow.Cells[1].Text + "','" + gvrow.Cells[2].Text + "')";

        cmd = new SqlCommand(st, cn);
        cmd.ExecuteNonQuery();
        Response.Write("Record inserted");
        cn.Close();

    }
}

一些额外的东西：

• 您不应该像使用字符串连接那样创建查询，否则您将面临sql injection攻击。 请改用参数化查询。

• 不需要像这样((CheckBox)grid_attendence.FindControl("chbox") as CheckBox)进行双重((CheckBox)grid_attendence.FindControl("chbox") as CheckBox)看看我的代码）

Answer 2

-将另一列添加到表状态布尔类型并将其值设置为0或1。

CheckBox chk = ((CheckBox)grid_attendence.FindControl("chbox") as CheckBox);
if (chk.Checked)
{
    st = "insert into atd(attend,stno,stname,status) values ('" + gvrow.Cells[0].Text + "','" + gvrow.Cells[1].Text + "','" + gvrow.Cells[2].Text + "',1)";
}
else
{
    st = "insert into atd(attend,stno,stname,status) values ('" + gvrow.Cells[0].Text + "','" + gvrow.Cells[1].Text + "','" + gvrow.Cells[2].Text + "',0)";
}
cmd = new SqlCommand(st, cn);
cmd.ExecuteNonQuery();
Response.Write("Record inserted");
cn.Close();