c# – 使用箭头更改ASP.NET中GridView中显示内容的顺序

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嗨,大家好,

我正在尝试使用表示箭头的图像,以允许用户更改项目在ASP.NET中的网格视图中的列表中显示的顺序.

我有一个类名为“position”的类,该类显示在GridView中并按位置排序.在网格视图的每一行中都有一个向上和向下箭头,我想要改变网格视图行所代表的对象的“位置”值.这是最简单的方法吗？

ASP –

<br /><strong>Previous Employment: </strong> <br />
                Pick one of your previous employers listed below to update/delete or <asp:HyperLink ID="PreviousEmploymentLink" runat="server" />.
                <asp:GridView runat="server" ID="EmploymentDataGrid" AutoGenerateColumns="false" OnRowDeleting="EmploymentDataGrid_onDeleting" 
                DataKeyNames="EmployerId" SkinID="FullWidthGrid" >
                <EmptyDataTemplate>
                <p>No Previous Employment added yet</p>
                </EmptyDataTemplate>
                    <Columns>
                            <asp:BoundField HeaderText="Dates" DataField="Dates" />
                            <asp:BoundField HeaderText="Employer's Name" DataField="EmployerName" />
                            <asp:BoundField HeaderText="Job Description" DataField="JobDescription" />
                            <asp:BoundField HeaderText="Job Title" DataField="JobTitle" />
                            <asp:HyperLinkField HeaderStyle-Width="30px" DataNavigateUrlFields="EmployerId"
                            HeaderText="Edit" Text="<img src='../../../Images/edit.gif' alt='Edit Employment' border='0'/>"
                            DataNavigateUrlFormatString="UpdatePreviousEmployment.aspx?PreviousEmploymentId={0}" />
                            <asp:TemplateField HeaderText="Delete" ItemStyle-HorizontalAlign="Center" HeaderStyle-Width="45px">
                                <ItemTemplate>
                                    <asp:ImageButton AlternateText="Delete User" ID="DeleteButton" runat="server" CommandName="Delete" ImageUrl="~/Images/delete.gif" />
                                </ItemTemplate>
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="Position" ItemStyle-HorizontalAlign="Center" HeaderStyle-Width="45px">
                                <ItemTemplate>
                                    <asp:ImageButton AlternateText="Move Up" ID="UpPositionButton" runat="server" CommandName="MoveEmploymentUp" OnClick="MoveEmploymentUp" ImageUrl="~/Images/arrow_up_green.gif" />
                                    <asp:ImageButton AlternateText="Move Down" ID="DownPositionButton" runat="server" CommandName="MoveEmploymentDown" ImageUrl="~/Images/arrow_down_green.gif" />
                                </ItemTemplate>
                            </asp:TemplateField>
                    </Columns>
                </asp:GridView>

谢谢！

解决方法:

protected void MoveEmploymentUp(object sender, ImageClickEventArgs e)
{
    ICVDao cvdao = DaoFactory.GetCVDao();        

    CV currentCv = cvdao.GetById(Int32.Parse(Request.Params["CVID"]), false);

    IEmployerDao eDao = DaoFactory.GetEmployerDao();


    ImageButton i = (ImageButton)sender;

    /*
     * if chap above
     * Swap numbers with chap above
     * if not
     * dont swap
     */

    GridViewRow g = (GridViewRow)i.Parent.Parent;

    Employer emp = (Employer)g.DataItem;

    EmploymentDataGrid.SelectedIndex = g.RowIndex;
    Employer movingEmployment = eDao.GetById(int.Parse(EmploymentDataGrid.SelectedDataKey.Value.ToString()), false);

    Employer otherEmployment = new Employer();

    if (movingEmployment.Position != 1 && currentCv.Employment.Count > 1)
    {
        foreach (Employer em in currentCv.Employment)
        {
            if (em.Position == movingEmployment.Position - 1)
                otherEmployment = em;
        }

        movingEmployment.Position -= 1;
        otherEmployment.Position += 1;

        eDao.SaveOrUpdate(movingEmployment);
        eDao.CommitChanges();
        eDao.SaveOrUpdate(otherEmployment);
        eDao.CommitChanges();

        EmploymentGridBind();

        //InstructionsLabel.Text = "Mover Dates:" +movingEmployment.Dates+ " ID:" + movingEmployment.EmployerId + " Position:" + movingEmployment.Position +
        //    "<br />Other Dates:" + otherEmployment.Dates + " ID:" + otherEmployment.EmployerId + " Position:" + otherEmployment.Position;
    }

}

不得不通过gridview对象而不是gridviewrow获取datakey值,使用它,其余的很容易

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