复选框asp.net c＃网格

Question

我目前有一个数据网格

"SELECT * FROM table WHERE Hentet = 'nej';"

在那个网格下，我有它的精确副本，但是

"WHERE Hentet = 'Ja';"

正如您将在代码中看到的那样。

两个网格都可以正常工作并获取它们应该获取的数据，但是“网格1”的每一行上都有一个复选框，因此您可以选择“任意行”，按一下按钮，然后输入Nej;值Nej; 换成Ja; 在该按钮上单击，因此具有选中复选框的行将被移动到Grid2，因为它们的值为= Ja 。 Grid2没有复选框列，因此它仅从grid1到grid2，而不是两种方式。

网格1

    <asp:DataGrid ID="GridView1" runat="server" DataSourceID="SqlDataSource1" AutoGenerateColumns="false">
           <Columns>
           <asp:TemplateColumn>
               <ItemTemplate>
               <asp:CheckBox ID="CheckBox1" runat="server"></asp:CheckBox>
                   </ItemTemplate>
           </asp:TemplateColumn>

           <asp:BoundColumn DataField="dato" HeaderText="Dato">
            </asp:BoundColumn>
            <asp:BoundColumn DataField="Antal" HeaderText="Antal">
            </asp:BoundColumn>
           <asp:Boundcolumn HeaderText="Navn" Datafield="VareNAvn">
            </asp:Boundcolumn>
       <asp:BoundColumn DataField="KøbtAfBrugerID" HeaderText="Købt af ID">
            </asp:BoundColumn>
            <asp:Boundcolumn HeaderText="Hented" DataField="Afhented">
                </asp:Boundcolumn>
       </Columns>
    </asp:DataGrid>
  <asp:Button ID="Button_Hented" CssClass="btfarve" runat="server" Text="Afhentet" OnClick="Button_Hented_Click" />
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
    ConnectionString="<%$ ConnectionStrings:DatabaseConnectionString1 %>" 
    SelectCommand="SELECT * FROM [Transactioner] WHERE afhented ='Nej';">
    </asp:SqlDataSource>

GRID2

<asp:DataGrid ID="GridView2" runat="server" DataSourceID="SqlDataSource2" AutoGenerateColumns="false">

           <Columns>
               <asp:BoundColumn DataField="dato" HeaderText="Dato">
                </asp:BoundColumn>
                <asp:BoundColumn DataField="Antal" HeaderText="Antal">
                </asp:BoundColumn>
               <asp:Boundcolumn HeaderText="Navn" Datafield="VareNAvn">
                </asp:Boundcolumn>
            <asp:BoundColumn DataField="KøbtAfBrugerID" HeaderText="Købt af ID">
                </asp:BoundColumn>
                <asp:Boundcolumn HeaderText="Hented" DataField="Afhented">
                    </asp:Boundcolumn>
           </Columns>
        </asp:DataGrid>
        <asp:SqlDataSource ID="SqlDataSource2" runat="server" 
        ConnectionString="<%$ ConnectionStrings:DatabaseConnectionString1 %>" 
        SelectCommand="SELECT * FROM [Transactioner] WHERE afhented ='Ja';">
        </asp:SqlDataSource>

背后的代码

protected void Button_Hented_Click(object sender, EventArgs e)
     {
         string Hejsa;

         SqlConnection conn = new SqlConnection();
         conn.ConnectionString = ConfigurationManager.ConnectionStrings["DatabaseConnectionString1"].ToString();

         SqlCommand cmd = new SqlCommand();
         cmd.Connection = conn;
         cmd.CommandText = "SELECT * FROM Transactioner";



         conn.Open();
         SqlDataReader reader = cmd.ExecuteReader();

         if (reader.Read())
         {

             Hejsa = reader["Id"].ToString();



             foreach (DataGridItem item in GridView1.Items)
             {
                 CheckBox Cb = item.Cells[0].Controls[1] as CheckBox;


                 if (Cb.Checked)
                 {

                     SqlConnection conn2 = new SqlConnection();
                     conn2.ConnectionString =
                         ConfigurationManager.ConnectionStrings["DatabaseConnectionString1"].ToString();
                     SqlCommand cmd2 = new SqlCommand();
                     cmd2.Connection = conn2;

                     cmd2.CommandText = "UPDATE Transactioner"
                         + " SET Afhented = @Afhented"
                         + " where Id = @Id";


                     cmd2.Parameters.Add("@Afhented", SqlDbType.NVarChar).Value = "Ja";
                     cmd2.Parameters.Add("@Id", SqlDbType.Int).Value = Hejsa;


                     conn2.Open();
                     cmd2.ExecuteNonQuery();
                     conn2.Close();

                 }

             }
             Response.Redirect(Request.RawUrl);

         }
         conn.Close();

        }

所以这就是全部代码，我完全没有收到任何错误消息，我真的看不到有什么问题了。我真正想要的代码是单击按钮，如果选中了复选框，则将值“ Nej”更改为“ Ja” ”。 抱歉，我的问题很难理解。 Tekar

Answer 1

<asp:DataGrid ID="GridView1" runat="server" DataSourceID="SqlDataSource1" AutoGenerateColumns="false">
           <Columns>
           <asp:TemplateColumn>
               <ItemTemplate>
               <asp:CheckBox ID="CheckBox1" runat="server"></asp:CheckBox>
                   </ItemTemplate>
           </asp:TemplateColumn>
<asp:BoundColumn DataField="Id" HeaderText="Id"> <!--New Column Added-->
           <asp:BoundColumn DataField="dato" HeaderText="Dato">
            </asp:BoundColumn>
            <asp:BoundColumn DataField="Antal" HeaderText="Antal">
            </asp:BoundColumn>
           <asp:Boundcolumn HeaderText="Navn" Datafield="VareNAvn">
            </asp:Boundcolumn>
       <asp:BoundColumn DataField="KøbtAfBrugerID" HeaderText="Købt af ID">
            </asp:BoundColumn>
            <asp:Boundcolumn HeaderText="Hented" DataField="Afhented">
                </asp:Boundcolumn>
       </Columns>
    </asp:DataGrid>
  <asp:Button ID="Button_Hented" CssClass="btfarve" runat="server" Text="Afhentet" OnClick="Button_Hented_Click" />
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
    ConnectionString="<%$ ConnectionStrings:DatabaseConnectionString1 %>" 
    SelectCommand="SELECT * FROM [Transactioner] WHERE afhented ='Nej';">
    </asp:SqlDataSource>

在您的按钮Click事件中，找到您要更新的记录的ID。

    protected void Button_Hented_Click(object sender, EventArgs e)
         {
             string Hejsa;

    // No need to keep on recreating these objects in a loop. 
    SqlConnection conn2 = new SqlConnection();
                         conn2.ConnectionString =
                             ConfigurationManager.ConnectionStrings["DatabaseConnectionString1"].ToString();
                         SqlCommand cmd2 = new SqlCommand();
                         cmd2.Connection = conn2;
    conn2.Open();
                 foreach (DataGridItem item in GridView1.Items)
                 {
                     CheckBox Cb = item.Cells[0].Controls[1] as CheckBox;


                     if (Cb.Checked)
                     {
                         Hesja = item.Cells[1].Text.Trim(); // Get the id of checked record


                         cmd2.CommandText = "UPDATE Transactioner"
                             + " SET Afhented = @Afhented"
                             + " where Id = @Id";


                         cmd2.Parameters.Add("@Afhented", SqlDbType.NVarChar).Value = "Ja";
                         cmd2.Parameters.Add("@Id", SqlDbType.Int).Value = Hejsa;



                         cmd2.ExecuteNonQuery();


                     }

                 }
 conn2.Close();
                 Response.Redirect(Request.RawUrl);


            }

如果要从Gridview隐藏新添加的Id列，请通过实现gridview的行数据绑定事件来隐藏该列。