Question

我想保留一些在数组列表中检查的数据。我在gridview中添加了复选框，当我检查其中一个项目时。复选框的click事件为所有人运行，例如，当我点击任意一个复选框运行4次时，我有两个数据，所以它适用于每一个但是，我希望只添加一个复选框的项目被选中或取消选中列出。有解决方案还是其他解决方案

     // checkbox click event 
    protected void SelectedFriends_Click(object sender, EventArgs e)
      {

        bool isflag=false;

        foreach (GridViewRow row in GridView1.Rows)
        {
            // Access the CheckBox
            CheckBox cb = (CheckBox)row.FindControl("FriendSelector");

            if (cb != null && cb.Checked)
            {




                string friendname = GridView1.Rows[row.RowIndex].Cells[1].Text.ToString();
                for (int i = 0; i < list.Count; i++)
                {
                    if (friendname.Equals(list[i].ToString()))
                    {
                        isflag = true;
                    }
                }
                // if it is added previously  don't add to list
                if(!isflag)
                {
                    list.Add(friendname);
                }

            }
            else
            {

                string friendname = GridView1.Rows[row.RowIndex].Cells[1].Text.ToString();
                for (int i = 0; i < list.Count; i++)
                {
                    if (friendname.Equals(list[i].ToString()))
                    {
                        isflag = true;
                    }
                }
                // if it is not checked and it is in list delete it from list
                if(isflag)
                {

                    list.Remove(friendname);
                }

            }
        }


    }






    <asp:GridView ID="GridView1" runat="server" AllowPaging="True" 
            AutoGenerateColumns="False" DataSourceID="SqlDataSource1" Font-Bold="True" 
            Width="157px">
            <Columns>
            <asp:TemplateField HeaderText="Select">
            <ItemTemplate>

                            <asp:CheckBox runat="server" id="FriendSelector" 
                  oncheckedchanged="SelectedFriends_Click" AutoPostBack="True">

            </asp:CheckBox>

            </ItemTemplate>

            </asp:TemplateField>
                <asp:BoundField DataField="F_Name" HeaderText="Friend Name" 
                    SortExpression="F_Name" />
            </Columns>


        </asp:GridView>

Answer 1

你能试试吗？

protected void SelectedFriends_Click(object sender, EventArgs e)
      {

        list.Clear();

        foreach (GridViewRow row in GridView1.Rows)
        {
            // Access the CheckBox
            CheckBox cb = (CheckBox)row.FindControl("FriendSelector");

            if (cb != null && cb.Checked)
            {

                string friendname = GridView1.Rows[row.RowIndex].Cells[1].Text.ToString();
                list.Add(friendname);

            }
         }


    }

如何在Gridview c＃asp.net中添加检查到arraylist的项目

1 个答案: