关于GridView中控件的问题

最近做项目报表时，会遇到在Gridview中有一些控件，报表中也会有更新、删除等一系列的操作，但往往会遇到一些控件取值取不到或者找不到控件得问题，通过网上查阅资料对其中的一些做一总结：

前台代码如下：

 　　<asp:GridView ID="gv" runat="server" AutoGenerateColumns="False" CssClass="GridViewStyle"
     DataKeyNames="ID"  OnRowEditing="gv_RowEditing" OnRowCancelingEdit="gv_RowCancelingEdit"
     OnRowUpdating="gv_RowUpdating" OnRowDataBound="gv_RowDataBound">
     <FooterStyle CssClass="GridViewFooterStyle" Font-Bold="False" />
                         <RowStyle CssClass="GridViewRowStyle" />
                         <SelectedRowStyle CssClass="GridViewSelectedRowStyle" />
                         <PagerStyle CssClass="GridViewPagerStyle" />
                         <AlternatingRowStyle CssClass="GridViewAlternatingRowStyle" />
                         <HeaderStyle CssClass="GridViewHeaderStyle" />
                         <EmptyDataTemplate>
                             <asp:Table ID="Table1" runat="server" CellPadding="-1" CellSpacing="" CssClass="GridViewHeaderStyle"
                                 GridLines="Vertical">
                                 <asp:TableRow>
                                     <asp:TableCell HorizontalAlign="center" Text="QAD" Width="40px"></asp:TableCell>
                                     <asp:TableCell HorizontalAlign="center" Text="单位" Width="50px"></asp:TableCell>
                                     <asp:TableCell HorizontalAlign="center" Text="物料描述1" Width="120px"></asp:TableCell>
                                     <asp:TableCell HorizontalAlign="center" Text="描述" Width="120px"></asp:TableCell>
                                     <asp:TableCell HorizontalAlign="center" Text="数量" Width="60px"></asp:TableCell>
                                 </asp:TableRow>
                             </asp:Table>
                         </EmptyDataTemplate>
                         <Columns>
                             <asp:TemplateField HeaderText="QAD" >
                                 <EditItemTemplate>
                                 <%--<asp:Label ID="txtQAD" runat="server" CssClass="cssQAD"  Text='<%# Bind("rp_QAD") %>'></asp:Label>--%>
                                 <asp:TextBox ID="txtQAD" runat="server" AutoComplete="Off" CssClass="SmallTextBox CCPPart cssQAD"  Text='<%# Bind("rp_QAD") %>'
                                     Width="100px"></asp:TextBox>
                                 </EditItemTemplate>
                                 <ItemStyle HorizontalAlign="Center" />
                                 <HeaderStyle HorizontalAlign="Center" Width="100px" />
                                 <ItemTemplate>
                                     <%#Eval("rp_QAD")%>
                                 </ItemTemplate>
                             </asp:TemplateField>
                             <asp:TemplateField HeaderText="基本单位">
                                 <EditItemTemplate>
                                 <asp:Label ID="txtPtUm" runat="server" CssClass="cssPtUm" Text='<%# Bind("rp_PtUm") %>'></asp:Label>
                                 </EditItemTemplate>
                                 <ItemStyle HorizontalAlign="Center" />
                                 <HeaderStyle HorizontalAlign="Center" Width="30px" />
                                 <ItemTemplate>
                                     <%#Eval("rp_PtUm")%>
                                 </ItemTemplate>
                             </asp:TemplateField>
                             <asp:TemplateField HeaderText="实际采购单位" >
                                 <EditItemTemplate>
                                     <asp:DropDownList ID="ddlUm" Width="35px" runat="server" DataTextField="pc_um" >
                                     </asp:DropDownList>
                                     <asp:TextBox ID="txtUmOther" Width="35px" runat="server"></asp:TextBox>
                                 </EditItemTemplate>
                                 <ItemStyle HorizontalAlign="Center" />
                                 <HeaderStyle HorizontalAlign="Center" Width="70px" />
                                 <ItemTemplate>
                                     <asp:Label ID="labUm" runat="server" Text='<%# Bind("rp_Um") %>'></asp:Label>
                                 </ItemTemplate>
                             </asp:TemplateField>
                             <asp:TemplateField HeaderText="实际数量">
                                 <EditItemTemplate>
                                 <asp:TextBox ID="txtQty" runat="server" CssClass="SmallTextBox cssQty" Text='<%# Bind("rp_Qty") %>'
                                     Width="40px"></asp:TextBox>
                                 </EditItemTemplate>
                                 <ItemStyle HorizontalAlign="Center" />
                                 <HeaderStyle HorizontalAlign="Center" Width="40px" />
                                 <ItemTemplate>
                                     <%#Eval("rp_Qty")%>
                                 </ItemTemplate>
                             </asp:TemplateField>
                             <asp:TemplateField HeaderText="物料描述1">
                                 <EditItemTemplate>
                                 <asp:Label ID="txtQADDesc1" runat="server" CssClass="cssQADDesc1" Text='<%# Bind("rp_QADDesc1") %>'></asp:Label>
                                 </EditItemTemplate>
                                 <ItemStyle HorizontalAlign="Center" />
                                 <HeaderStyle HorizontalAlign="Center" Width="100px" />
                                 <ItemTemplate>
                                     <%#Eval("rp_QADDesc1")%>
                                 </ItemTemplate>
                             </asp:TemplateField>
                             <asp:BoundField DataField="rp_Descript" HeaderText="描述" ReadOnly="True">
                                 <HeaderStyle Width="100px" HorizontalAlign="Right" Font-Bold="False" />
                                 <ItemStyle Width="100px" HorizontalAlign="Right" />
                             </asp:BoundField>
                             <asp:CommandField ShowEditButton="True" CancelText="<u>取消</u>" DeleteText="<u>删除</u>"
                                 EditText="<u>编辑</u>" UpdateText="<u>更新</u>">
                                 <HeaderStyle Width="70px" HorizontalAlign="Center" />
                                 <ItemStyle HorizontalAlign="Center" />
                                 <ControlStyle Font-Bold="False" Font-Size="12px" />
                             </asp:CommandField>
                         </Columns>
                     </asp:GridView>

更新和绑定时时获取控件的值要根据每一行的index，然后根据控件的ID值获取到对应控件的值

后台代码如下：

     protected void gv_RowUpdating(object sender, GridViewUpdateEventArgs e)
     {
  7         string um = ((DropDownList)gv.Rows[e.RowIndex].Cells[6].FindControl("ddlUm")).Text.ToString().Trim();
  8         string qaddesc1 = ((Label)gv.Rows[e.RowIndex].Cells[8].FindControl("txtQADDesc1")).Text.ToString().Trim();
  9         string qty = ((TextBox)gv.Rows[e.RowIndex].Cells[7].FindControl("txtQty")).Text.ToString().Trim();
 13         .......
154     }
179     protected void gv_RowDataBound(object sender, GridViewRowEventArgs e)
180     {
181         if (e.Row.RowType == DataControlRowType.DataRow)
182         {
183             string qad= ((TextBox)e.Row.FindControl("txtQAD")).ToString();
188             string dum = ((DropDownList)e.Row.FindControl("ddlUm")).ToString();
198             string lum = ((Label)e.Row.FindControl("labUm")).Text.ToString();
218             .......
222         }
223     }

以上只是在做的过程中遇到的，在以后遇到类似的问题会进行补充更新；

不足之处多多指教，如有雷同请联系楼主！