從ASP.NET C＃中的gridview中選擇時，檢索並存儲數據庫中的復選框值？

Question

我有一個包含CheckBox的GridView，它顯示學生的出勤信息。 當我檢查CheckBox時，該值（是位值）不會存儲在數據庫中。

這是我的代碼：

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

通過(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();

    }
}

一些額外的東西：

• 您不應該像使用字符串連接那樣創建查詢，否則您將面臨sql injection攻擊。 請改用參數化查詢。

• 不需要像這樣((CheckBox)grid_attendence.FindControl("chbox") as CheckBox)進行雙重((CheckBox)grid_attendence.FindControl("chbox") as CheckBox)看看我的代碼）

Answer 2

-將另一列添加到表狀態布爾類型並將其值設置為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();