在线等候，一个初学者的问题，解决马上就给分，付上简短的代码

Question

<asp:FormView ID="FormView1" runat="server"  DefaultMode="Insert" Width="809px" 
                                        DataSourceID="ObjectDataSource3" EnableModelValidation="True">
            <InsertItemTemplate>                        <table class="tab2" border="1" cellpadding="0" cellspacing="0" frame="border">
                <tr>
                    <td class="style1">
                        <asp:Label ID="Label1" runat="server" Text="产品标题："></asp:Label>
                    </td>
                    <td class="style2">
                        <asp:TextBox ID="TextBox1" runat="server" CssClass="textbox1" Text='<%#Bind("proname") %>'></asp:TextBox>
                    </td>
                </tr>
                <tr>
                    <td class="style1">
                        <asp:Label ID="Label2" runat="server" Text="产品类别："></asp:Label>
                    </td>
                    <td class="style2">
                        <asp:DropDownList ID="DropDownList1" runat="server" 
                            DataSourceID="ObjectDataSource1"   AutoPostBack="true" DataTextField="categoryname" DataValueField='<%#Bind("categoryid") %>' >                        </asp:DropDownList>
                        <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" 
                            SelectMethod="getcategory" TypeName="category" ></asp:ObjectDataSource>
                    </td>
                </tr>
                <tr>
                    <td class="style1">
                        <asp:Label ID="Label3" runat="server" Text="产品品牌："></asp:Label>
                    </td>
                    <td class="style2">
                        <asp:DropDownList ID="DropDownList2" runat="server" 
                            DataSourceID="ObjectDataSource2" DataTextField="brandname" DataValueField='<%#Bind("brandid") %>'>
                        </asp:DropDownList>
                        <asp:ObjectDataSource ID="ObjectDataSource2" runat="server" 
                            SelectMethod="getbrand" TypeName="brand"></asp:ObjectDataSource>
                    </td>
                </tr>
                <tr>
                    <td class="style1">
                        <asp:Label ID="Label4" runat="server" Text="产品概述："></asp:Label>
                    </td>
                    <td class="style2">
                        <asp:TextBox ID="TextBox2" runat="server" CssClass="textbox_multi" 
                            TextMode="MultiLine" Text='<%#Bind("prosummary") %>'></asp:TextBox>
                    </td>
                </tr>
                <tr>
                    <td class="style1">
                        <asp:Label ID="Label5" runat="server" Text="产品图片："></asp:Label>
                    </td>
                    <td class="style2">
                        <asp:FileUpload ID="FileUpload1" runat="server" CssClass="textbox1" />
                    </td>
                </tr>
                            <tr>
                                <td class="style1">
                                    &nbsp;</td>
                                <td class="style2">
                                    <asp:Label ID="Label6" runat="server" Text="上传图片的地址"></asp:Label>
                                </td>
                            </tr>
                <tr>
                    <td colspan="2">
                        <asp:Button ID="Button1" runat="server" CssClass="button1" Text="添加"  CommandName="Insert" />
                        <asp:Button ID="Button2" runat="server" CausesValidation="False" 
                            CssClass="button1" Text="重置" />
                    </td>
                </tr>
                <tr>
                    <td colspan="2">
                        &nbsp;</td>
                </tr>
            </table>            </InsertItemTemplate>
            </asp:FormView>
                                    <br />
                                <asp:ObjectDataSource ID="ObjectDataSource3" runat="server" TypeName="pro" InsertMethod="insertpro" >
                                    <InsertParameters>
                                        <asp:ControlParameter ControlID="DropDownList1" Name="categoryid"  Type="Int32"/>
                                        <asp:ControlParameter ControlID="TextBox1" Name="proname" />
                                        <asp:ControlParameter ControlID="TextBox2" Name="prosummary" />
                                        <asp:ControlParameter ControlID="DropDownList2" Name="brandid"  Type="Int32"/>
                                    </InsertParameters>
                                    </asp:ObjectDataSource>    上面是.aspx页面，下面是添加的类----------------- public void insertpro(string proname,int categoryid,int brandid,string prosummary)
    {
        SqlConnection con = new SqlConnection(_connstring);
        SqlCommand cmd = new SqlCommand();
        cmd.Connection = con;
        cmd.CommandText = "insert pro (proname,categoryid,brandid,prosummary) values (@proname,@categoryid,@brandid,@prosummary)";
        cmd.Parameters.AddWithValue("@proname",proname);
        cmd.Parameters.AddWithValue("@categoryid",categoryid);
        cmd.Parameters.AddWithValue("@brandid", brandid);
        cmd.Parameters.AddWithValue("@prosummary", prosummary);        using (con)
        {
            con.Open();
            cmd.ExecuteNonQuery();
        }
    }提示错误为： Could not find control 'DropDownList1' in ControlParameter 'categoryid'. 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.InvalidOperationException: Could not find control 'DropDownList1' in ControlParameter 'categoryid'.在线等候，谢谢各位

Answer 1

<asp:ControlParameter ControlID="DropDownList1" Name="categoryid"  Type="Int32"/>
改为<asp:ControlParameter Name="hours" ControlID="DropDownList1" PropertyName="SelectedValue" Type="Int32" />
前面绑的时候用SelectedValue来绑定

Answer 2

asp:ControlParameter ControlID="DropDownList1" Name="bm" 
PropertyName="SelectedValue" Type="Int32" />
</SelectParameters> 

Answer 3

<asp:DropDownList ID="DropDownList1" runat="server" 
                            DataSourceID="ObjectDataSource1"   AutoPostBack="true" DataTextField="categoryname" DataValueField='<%#Bind("categoryid") %>' >这个写法有问题吧

Answer 4

看这个DEMO
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" AutoGenerateEditButton="True" 
                        DataSourceID="SqlDataSource1">
                        <Columns>
                            <asp:BoundField DataField="id" HeaderText="Emp ID #" ReadOnly="True" SortExpression="id" />
                            <asp:BoundField DataField="name" HeaderText="Name" SortExpression="name" />
                            <asp:TemplateField HeaderText="Hours Worked" SortExpression="hours">
                            <EditItemTemplate>
                                <asp:DropDownList ID="someDDL" runat="server" SelectedValue='<%# Bind("hours") %>'>
                                </asp:DropDownList>
                            </EditItemTemplate>
                            <ItemTemplate>
                                <asp:Label ID="LabelHours" runat="server" Text='<%# Bind("hours") %>'></asp:Label>
                            </ItemTemplate>
                            </asp:TemplateField>
                        </Columns>
                    </asp:GridView>
                    <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:timesheetConnectionString2 %>"
                        SelectCommand="SELECT * FROM [test_table]" 
                        UpdateCommand="Update [test_table] set [address] = @address, [name] = @name, [hours] = @hours">
                        <UpdateParameters>
                            <asp:Parameter Name="name" />
                            <asp:ControlParameter Name="hours" ControlID="someDDL" PropertyName="SelectedValue" Type="decimal" />
                            <asp:Parameter Name="address"  />
                            <asp:Parameter Name="id"/>
                        </UpdateParameters>
                    </asp:SqlDataSource>

Answer 5

<asp:DropDownList ID="DropDownList1" runat="server" 
                            AutoPostBack="True" DataTextField'<%#Bind("categoryname") %>'DataValueField='<%#Bind("categoryid") %>' >                         </asp:DropDownList>

Answer 6

楼上大哥，谢谢
如果我同事需要 dropdownlist 的 datafieldtext 值和 datafieldvalue 值，你那个写法怎么用呢？这里我正是要用两个数据都要用，取得categoryID同时取得categoryname 

Answer 7

sqldatasource insert

Answer 8

用object 数据源控件大家都答非所问啊，都没认真看问题，这样还想拿分，⊙﹏⊙b汗

Answer 9

dropdownlist.SelectedValue   实际值   categoryID
dropdownlist.SelectedText    显示值   categoryname

Answer 10

楼主试试看这个行不行:首先定义控件属性:
<asp:DropDownList ID="DropDownList1" runat="server" 
    DataSourceID="ObjectDataSource1"   AutoPostBack="true" DataTextField="categoryname" DataValueField="categoryid"> </asp:DropDownList>
然后关联:
<asp:ControlParameter Name="hours" ControlID="DropDownList1" PropertyName=”SelectedValue” />
<asp:ControlParameter Name="hours" ControlID="DropDownList1" PropertyName=”SelectedText” />

Answer 11

这个我理解，但是上面大哥说的只能取得1个值，如果按照11楼大哥的做法，也是取不到值的。问题已经解决，最后用的方法是 inserting 事件中，重新指定参数的值谢谢各位了，结贴