GridView 中如何实现编辑 删除(在编辑状态中 嵌套DropDownList)

以下是前台的代码:

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" CellPadding="4"
                    ForeColor="#333333" GridLines="None" Width="650px"    onrowcancelingedit="GridView1_RowCancelingEdit"
                    onrowdeleting="GridView1_RowDeleting" onrowediting="GridView1_RowEditing" onrowupdating="GridView1_RowUpdating"
                    FooterStyle-BackColor="#990000" Font-Bold="true" DataKeyNames="UserID" onrowdatabound="GridView1_RowDataBound">
                    <columns>
                <asp:BoundField DataField="UserID" HeaderText="UserID" ReadOnly="true" />
                <asp:BoundField DataField="UserName" HeaderText="UserName" />
                <asp:BoundField DataField="UserPwd" HeaderText="UserPwd" />
                <%--<asp:BoundField DataField="Gender" HeaderText="Gender" />--%>
                <asp:TemplateField HeaderText="Gender">
                <EditItemTemplate>
                <asp:DropDownList ID="Gender" runat="server">
                    </asp:DropDownList>
                    </EditItemTemplate>
                <ItemTemplate>
                    <%# Eval("Gender")%>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:BoundField DataField="PhoneNumber" HeaderText="PhoneNumber" />
                <asp:BoundField DataField="Address" HeaderText="Address" />
                <asp:CommandField HeaderText="Select" ShowSelectButton="True" />
                <asp:CommandField HeaderText="Edit" ShowEditButton="true" />
                <asp:CommandField HeaderText="Delete" ShowDeleteButton="true" />
                </columns>
                    <rowstyle forecolor="#000066" />
                    <selectedrowstyle backcolor="#669999" font-bold="true" forecolor="White" />
                    <pagerstyle backcolor="White" forecolor="#000066" horizontalalign="Left" />
                    <headerstyle backcolor="#006699" font-bold="true" forecolor="White" />
                </asp:GridView>

后台部分代码代码:  //关键是几个事件中的代码

  protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        string sqlstr = "delete from [Kiros].[Static_User] where UserID=" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "";
        MyDBHelper Kiros = new MyDBHelper();
        Kiros.Excute_Command(sqlstr);
        GridView_Bind();
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;   //显示编辑状态
        GridView_Bind();

    }

　　////更新事件
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)  
    {
        string ProcNameModify = "[Kiros].[ModifyUserInfo]";
        MyDBHelper Kiros2 = new MyDBHelper();
        string U1 = GridView1.Rows[e.RowIndex].Cells[0].Text;
        string U2 = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[1].Controls[0])).Text.ToString().Trim();
        string U3 = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[2].Controls[0])).Text.ToString().Trim();
        bool U4 = Convert.ToBoolean(((DropDownList)(GridView1.Rows[e.RowIndex].Cells[3].FindControl("Gender"))).SelectedValue);
        string U5 = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[4].Controls[0])).Text.ToString().Trim();
        string U6 = ((TextBox)(GridView1.Rows[e.RowIndex].Cells[5].Controls[0])).Text.ToString().Trim();
        UserInfo UI2 = new UserInfo(U1, U2, U3, U4, U5, U6);
        UserInfo_Params UP2 = new UserInfo_Params();
        Kiros2.Proc_InsertRows_Excute(ProcNameModify, UP2.UserInfoToParams(UI2));
        GridView1.EditIndex = -1;
        GridView_Bind();
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;   //关闭编辑状态
        GridView_Bind();
    }

    protected void GridView_Bind()   //给GridView绑定数据源
    {
        string ProcNameUI = "[Kiros].[ShowUserInfo]";
        MyDBHelper Kiros = new MyDBHelper();
        DataSet DS = new DataSet();
        DS = Kiros.Proc_ShowRows_DataSet(DS, ProcNameUI);
        GridView1.DataSource = DS;
        GridView1.DataBind();
    }

    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowState == DataControlRowState.Edit || e.Row.RowState == (DataControlRowState.Alternate | DataControlRowState.Edit))
        {
            DropDownList dll = (DropDownList)e.Row.FindControl("Gender");

            dll.Items.Add(new ListItem("Male", "true"));
            dll.Items.Add(new ListItem("Female", "false"));

        }
    }

以上要注意的是   RowDataBound事件，在编辑状态中给DropDownList绑定值的时候，一定要加上判断语句：

 if (e.Row.RowState == DataControlRowState.Edit || e.Row.RowState == (DataControlRowState.Alternate | DataControlRowState.Edit))

来判断是否是编辑状态，GridView有几种状态，可以查询MSDN