在GridView中更新一行ASP NET不起作用

Question

我是新的ASP.NET開發人員並嘗試更新GridView中的一行。我嘗試了許多解決方案，但它不起作用。當我更新一行時，不會顯示錯誤消息，但不會考慮更新。

<asp:GridView ID="grd_quest" Visible = "False" runat="server" CellPadding="4" 
        DataSourceID="ERP_questionn" ForeColor="#333333" GridLines="None" 
        AutoGenerateColumns="False" DataKeyNames="QUE_id"> 
       <AlternatingRowStyle BackColor="White" ForeColor="#284775" /> 
    <Columns> 
     <asp:CommandField ShowEditButton="true" /> 

     <asp:BoundField DataField="QUE_id" HeaderText="ID" ReadOnly="True" 
      SortExpression="QUE_id" ItemStyle-Width="10%" /> 
     <asp:BoundField DataField="QUE_libelle" HeaderText="Libelle" 
      SortExpression="QUE_libelle" /> 

    </Columns> 
    <EditRowStyle BackColor="#999999" /> 
    <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" /> 
    <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" /> 
    <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" /> 
    <RowStyle BackColor="#F7F6F3" ForeColor="#333333" /> 
    <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" /> 
    <SortedAscendingCellStyle BackColor="#E9E7E2" /> 
    <SortedAscendingHeaderStyle BackColor="#506C8C" /> 
    <SortedDescendingCellStyle BackColor="#FFFDF8" /> 
    <SortedDescendingHeaderStyle BackColor="#6F8DAE" /> 
</asp:GridView> 

<asp:SqlDataSource ID="ERP_questionn" runat="server" 
     ConnectionString="<%$ ConnectionStrings:ERPConnectionString %>" 
     SelectCommand="" 
     UpdateCommand= 
     "UPDATE [TR_QUESTION] SET [QUE_libelle] = @QUE_libelle WHERE [QUE_id] = @QUE_id"> 
    <UpdateParameters> 
     <asp:Parameter Name="QUE_libelle" Type="String" /> 
     <asp:Parameter Name="QUE_id" Type="Int32" /> 
    </UpdateParameters> 
</asp:SqlDataSource> 

，因爲它在其他功能變化的SELECT命令，這裏沒有書面清單，所以我寫在C＃中SelectCommand。 我希望這是清楚你

[編輯]

我曾嘗試與此的其他解決方案在C＃：

protected void grd_quest_RowUpdating(object sender, GridViewUpdateEventArgs e) 
    { 
     SqlConnection sqlConnection1 = new SqlConnection(connectionString); 
     int id = Convert.ToInt32(grd_quest.DataKeys[e.RowIndex].Value.ToString()); 
     GridViewRow row = (GridViewRow)grd_quest.Rows[e.RowIndex]; 

     //TextBox txtname=(TextBox)gr.cell[].control[]; 

     TextBox textadd = (TextBox)row.Cells[2].Controls[0]; 

     //TextBox textadd = (TextBox)row.FindControl("txtadd"); 
     //TextBox textc = (TextBox)row.FindControl("txtc"); 
     grd_quest.EditIndex = -1; 
     sqlConnection1.Open(); 
     //SqlCommand cmd = new SqlCommand("SELECT * FROM detail", conn); 
     SqlCommand cmd = new SqlCommand("UPDATE TR_QUESTION SET QUE_libelle = @p_libelle where QUE_id = @p_id ", sqlConnection1); 
     cmd.Parameters.AddWithValue("@p_id", id); 
     cmd.Parameters.AddWithValue("@p_libelle", textadd.Text);   
     cmd.ExecuteNonQuery(); 
     sqlConnection1.Close(); 
     grd_quest.DataBind(); 

    } 

但它不工作過，我有誰要說的錯誤信息即：

數據源'ERP_questionn'不支持更新，除非指定了UpdateCommand。我有嘗試：更新命令=「」，但它不工作太

[編輯新的嘗試]

protected void grd_quest_RowUpdating(object sender, GridViewUpdateEventArgs e) 
    { 

     string id = grd_quest.DataKeys[e.RowIndex].Value.ToString(); 
     string libelle = ((TextBox)grd_quest.Rows[e.RowIndex].Cells[2].Controls[0]).Text; 
     ERP_questionn.UpdateParameters["QUE_id"].DefaultValue = id; 
     ERP_questionn.UpdateParameters["QUE_libelle"].DefaultValue = libelle; 
     ERP_questionn.Update(); 
     //ERP_questionn.SelectCommand = DropDownList1.SelectedValue; 

    } 

當我更新行，而不是錯誤消息，但更新不考慮。

[編輯]

也許這可以幫助，在我的GridView我這樣做是爲了顯示我的數據：

protected void lst_facteur_SelectedIndexChanged(object sender, EventArgs e) 
    { 
     if (lst_pos.SelectedValue == "1") 
     { 
      ERP_questionn.SelectCommand = "select * FROM TR_QUESTION WHERE FAC_id =" + lst_facteur.SelectedValue + " AND QUE_ordreUsine IS NOT NULL"; 

     } 
     else if (lst_pos.SelectedValue == "2") 
     { 
      ERP_questionn.SelectCommand = "select * FROM TR_QUESTION WHERE FAC_id =" + lst_facteur.SelectedValue + " AND QUE_ordreBureau IS NOT NULL"; 
     } 

     grd_quest.DataBind(); 
     grd_quest.Visible = true; 
     txt_question.Visible = true; 
     btn_add_question.Visible = true; 

我一直在更新的問題...

Answer 1

你必須設置SelectCommand = "SELECT * FROM [TR_QUESTION]"在HTML代碼也：

<asp:GridView ID="grd_quest" runat="server" AutoGenerateColumns="False" DataKeyNames="QUE_id" DataSourceID="ERP_questionn"> 
    <Columns> 
     <asp:CommandField ShowEditButton="True" /> 
     <asp:BoundField DataField="QUE_id" HeaderText="ID" InsertVisible="False" ReadOnly="True" SortExpression="QUE_id" /> 
     <asp:BoundField DataField="QUE_libelle" HeaderText="Libelle" SortExpression="QUE_libelle" /> 
    </Columns> 
</asp:GridView> 

<asp:SqlDataSource ID="ERP_questionn" runat="server" 
     ConnectionString="<%$ ConnectionStrings:ERPConnectionString %>" 
     SelectCommand = "SELECT * FROM [TR_QUESTION]" 
     UpdateCommand = 
     "UPDATE [TR_QUESTION] SET [QUE_libelle] = @QUE_libelle WHERE [QUE_id] = @QUE_id"> 
</asp:SqlDataSource> 

Answer 2

"UPDATE [TR_QUESTION] SET [QUE_libelle] =? WHERE [QUE_id] =?" 

除此之外，您還沒有在gridview上設置更新命令事件。

引發OnRowUpdated =「CustomersGridView_RowUpdated」