protected void btn_delete_Click(object sender, EventArgs e)     {         for (int i = 0; i <this.GridView1.Rows.Count; i++)         {             int id = Convert.ToInt32(this.GridView1.DataKeys[i].Value);             if ((this.GridView1.Rows[i].Cells[0].FindControl("CheckBox1") as CheckBox).Checked == true)             {                 Delete(id);                 ClientScript.RegisterStartupScript(GetType(),"提示","<script>alert('删除成功！')</script>");             }         }         this.GridView1.DataBind();     }//删除     private void Delete(int id)     {         using (SqlConnection conn = new SqlConnection(str))         {             conn.Open();             SqlCommand comm = conn.CreateCommand();             comm.CommandText = "delete from Notice_Msg where id=@id";             comm.Parameters.Add(new SqlParameter("@id", id));             comm.ExecuteNonQuery();         }     }

<asp:GridView ID="GridView1" runat="server" DataKeyNames="id">

 protected void btn_delete_Click(object sender, EventArgs e)     {         foreach (GridViewRow row in this.GridView1.Rows)         {             if (row.RowType == DataControlRowType.DataRow)             {                 CheckBox ckb = row.Cells[2].FindControl("CheckBox1") as CheckBox;                 if (ckb.Checked)                 {                     using (SqlConnection sqlCnn = new SqlConnection(str))                     {                         using (SqlCommand sqlCmm = sqlCnn.CreateCommand())                         {                             sqlCmm.CommandText = "delete from Regime_Table where id='" + row.Cells[0].Text + "' ";                             sqlCnn.Open();                             int a= sqlCmm.ExecuteNonQuery();                             if (a>0)                             {                                 ClientScript.RegisterStartupScript(GetType(),"提示","<script>alert('删除成功！')</script>");                             }                             else                             {                                 ClientScript.RegisterStartupScript(GetType(), "提示", "<script>alert('删除失败！')</script>");                             }                             this.DataBind();                         }                     }                 }             }         }     }

<style type="text/css">     .Hidden     {         display:none;     }     </style> <asp:BoundField DataField="id" HeaderText="编号" >                    <HeaderStyle CssClass="Hidden" />                    <ItemStyle CssClass="Hidden" />                    </asp:BoundField>

<script type="text/jscript">          function change(sender) {              var table = document.getElementById("GridView1");              for (var i = 1; i < table.rows.length; i++) {                  table.rows[i].cells[1].getElementsByTagName("input")[0].checked = sender.checked;              }          }     </script> <HeaderTemplate>       <input id="Checkbox2" type="checkbox" onclick="change(this)"/>              全选          </HeaderTemplate>