如何使用DropDownList更新GridView中一個值的狀態？

Question

我的數據庫中有兩個表，如下所示：

建議表：ID，標題，描述，StatusID等

狀態表：ID，狀態

我正在使用GridView來顯示建議，並在最后一列中放置了一個DropDownList，用於選擇每個建議的狀態。 現在，當我嘗試通過從DropDownList中選擇狀態來更新已提交建議之一的狀態時，已選擇了該值，但該值已更新，但對於所有建議，我都不知道為什么

我的ASP.NET代碼：

<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
                        AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="ID"
                        width="950px" CssClass="mGrid"
                        AlternatingRowStyle-CssClass="alt"
                        RowStyle-HorizontalAlign="Center"
                        DataSourceID="SqlDataSource1"
                        OnRowDataBound="GridView1_RowDataBound" >
            <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
            <HeaderStyle Font-Bold = "true" ForeColor="Black" Height="20px"/>
            <Columns>
                <asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False"
                    ReadOnly="True" SortExpression="ID" />
                <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
                <asp:BoundField DataField="Description" HeaderText="Description"
                    SortExpression="Description" />
                <asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
                <asp:BoundField DataField="Username" HeaderText="Username"
                    SortExpression="Username" />
                <asp:BoundField DataField="DivisionShortcut" HeaderText="Division"
                    SortExpression="DivisionShortcut" />
                <asp:TemplateField HeaderText="Status">
                    <ItemTemplate>
                        <asp:DropDownList ID="DropDownList" runat="server" DataSourceID="SqlDataSource2"
                                          Font-Bold="True" ForeColor="#006666" AppendDataBoundItems="false"
                                          DataTextField="Status" DataValueField="ID" AutoPostBack="true"
                                          OnDataBound="DropDownList_DataBound">
                        </asp:DropDownList>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server"
            ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
            SelectCommand="SELECT     dbo.SafetySuggestionsLog.ID, dbo.SafetySuggestionsLog.Title, dbo.SafetySuggestionsLog.Description, dbo.employee.Name, dbo.SafetySuggestionsLog.Username,
                      dbo.Divisions.DivisionShortcut
FROM         dbo.employee INNER JOIN
                      dbo.SafetySuggestionsLog ON dbo.employee.Username = dbo.SafetySuggestionsLog.Username INNER JOIN
                      dbo.Divisions ON dbo.employee.DivisionCode = dbo.Divisions.SapCode"
                      FilterExpression="[DivisionShortcut] like '{0}%'">

                      <FilterParameters>
                        <asp:ControlParameter ControlID="ddlDivision" Name="DivisionShortcut"
                                                 PropertyName="SelectedValue" Type="String" />
                    </FilterParameters>
        </asp:SqlDataSource>

        <%--For the DropDownList--%>
        <asp:SqlDataSource ID="SqlDataSource2" runat="server"
        ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
        SelectCommand="SELECT * FROM [SafetySuggestionsStatus]"></asp:SqlDataSource>

我的代碼背后：

protected void DropDownList_SelectedIndexChanged(object sender, EventArgs e)
    {
        DropDownList ddl = (DropDownList)sender;
        int suggestionStatus = int.Parse(ddl.SelectedValue);

        //For inserting the status in the database
        string connString = "Data Source=localhost\\sqlexpress;Initial Catalog=psspdbTest;Integrated Security=True";
        string updateCommand = "UPDATE SafetySuggestionsLog  SET [StatusID] = @StatusID WHERE [ID] = @ID";
        using (SqlConnection conn = new SqlConnection(connString))
        {
            conn.Open();
            using (SqlCommand cmd = new SqlCommand(updateCommand, conn))
            {
                cmd.Parameters.Clear();
                cmd.Parameters.AddWithValue("@StatusID", suggestionStatus);
                cmd.ExecuteNonQuery();
            }
            conn.Close();
        }
    }

**編輯：**

我如上所述修改了DropDownList_SelectedIndexChanged() ，但現在的問題是：

當我嘗試更新其中一項建議的狀態時，所有建議的狀態都會更新，我不知道為什么

那么如何解決此問題以能夠更新數據庫（GridView）中已提交建議之一的狀態？**

Answer 1

@ID參數丟失。

protected void DropDownList_SelectedIndexChanged(object sender, EventArgs e)
    {
        DropDownList ddl = (DropDownList)sender;
        int suggestionStatus = int.Parse(ddl.SelectedValue);
        GridViewRow row = (GridViewRow)ddl.NamingContainer;
        string strID = GridView1.DataKeys[row.RowIndex]["ID"].Value.ToString();
        int ID = Int32.Parse(strID);
        //For inserting the status in the database
        string connString = "Data Source=localhost\\sqlexpress;Initial Catalog=psspdbTest;Integrated Security=True";
        string updateCommand = "UPDATE SafetySuggestionsLog  SET [StatusID] = @StatusID WHERE [ID] = @ID";
        using (SqlConnection conn = new SqlConnection(connString))
        {
            conn.Open();
            using (SqlCommand cmd = new SqlCommand(updateCommand, conn))
            {
                cmd.Parameters.Clear();
                cmd.Parameters.AddWithValue("@StatusID", suggestionStatus);
                cmd.Parameters.AddWithValue("@ID", ID);
                cmd.ExecuteNonQuery();
            }
            conn.Close();
        }
    }