更新GridView中的列行C＃

我有一個問題，我找不到解決方案。如下圖所示，我有一個gridView來顯示事件列表。我想要的是比較「eventEndDate」列值與當天，以便更新最後一列行「eventStatus」。更新GridView中的列行C＃

所以，我增加了一個while循環通過讀取數據庫並獲得「EventEndDate」的值如下：

while (reader.Read()) 
     { 

      result.Add(reader.GetValue(4).ToString()); 
     } 
     reader.Close();

然後，負載方法中我也添加了這些代碼：

string currentDate = DateTime.Now.ToString("MMMM/d/yyyy"); 
      //endDate = DateTime.Now.ToString("MMMM/d/yyyy"); 
      //TextBox1.Text = Session["CountryName"].ToString(); 
      country = Session["CountryName"].ToString(); 
      SqlDataSource1.SelectCommand = "SELECT * FROM EventsEnglish WHERE CountryName ='" + country + "'"; 
      SqlDataSource1.DataBind(); 

      foreach (var lastDay in result) 
      { 

       string lastDayDate = Convert.ToDateTime(lastDay).ToString("MMMM/d/yyyy"); 

       if (DateTime.ParseExact(lastDayDate, "MMMM/d/yyyy", CultureInfo.InvariantCulture) > DateTime.ParseExact(currentDate, "MMMM/d/yyyy", CultureInfo.InvariantCulture)) 
       { 

        SqlDataSource1.UpdateCommand = "UPDATE EventsEnglish SET EventStatus = Open"; 
        SqlDataSource1.DataBind(); 

       } 
       else 
       { 
        SqlDataSource1.UpdateCommand = "UPDATE EventsEnglish SET EventStatus = Close"; 
        SqlDataSource1.DataBind(); 
       }

問題是，我沒有得到任何錯誤消息，但事件狀態不更新... 那麼，我在做什麼錯？

來源

2016-11-28 user3599431

什麼是你的EventStatus列的數據類型？UPDATE EventsEnglish SET EventStatus = Close'如果數據類型是varchar這會給出錯誤，你忘了'（單引號） – jayvee

它是nvarchar（MAX） – user3599431

看來這是我真正的問題！thnx – user3599431

我正在爲一個項目做同樣的事情。我使用這種類型的C＃電網的連接到SQL Server和更新工作正常，（你只需要改變的綁定列值，用於更新的SQL命令和參數進行更新。

<body> 
    <form id="form1" runat="server"> 
    <div style="height: 300px"> 
     <asp:Button CssClass="btn btn-primary" ID="btn_back_to_admin" runat="server" Text="Back to Admin" OnClick="btn_back_to_admin_Click" /> 
     <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" DataKeyNames="ID" DataSourceID="SqlDataSource1" ForeColor="#333333" GridLines="None" Height="260px" style="margin-bottom: 116px"> 
      <AlternatingRowStyle BackColor="White" /> 
      <Columns> 
       <asp:CommandField ShowEditButton="True" /> 
       <asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False" ReadOnly="True" SortExpression="ID" /> 
       <asp:BoundField DataField="Nombre" HeaderText="Nombre" SortExpression="Nombre" /> 
       <asp:BoundField DataField="Precio" HeaderText="Precio" SortExpression="Precio" /> 
       <asp:BoundField DataField="Codigo" HeaderText="Codigo" SortExpression="Codigo" /> 
       <asp:BoundField DataField="Garantia" HeaderText="Garantia" SortExpression="Garantia" /> 
       <asp:BoundField DataField="Marca" HeaderText="Marca" SortExpression="Marca" /> 
       <asp:BoundField DataField="AspectosTecnicos" HeaderText="AspectosTecnicos" SortExpression="AspectosTecnicos" /> 
       <asp:BoundField DataField="Fotografia1" HeaderText="Fotografia" SortExpression="Fotografia1" /> 
       <asp:BoundField DataField="Descripcion" HeaderText="Descripcion" SortExpression="Descripcion" /> 
      </Columns> 
      <EditRowStyle BackColor="#2461BF" /> 
      <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" /> 
      <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" /> 
      <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" /> 
      <RowStyle BackColor="#EFF3FB" /> 
      <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" /> 
      <SortedAscendingCellStyle BackColor="#F5F7FB" /> 
      <SortedAscendingHeaderStyle BackColor="#6D95E1" /> 
      <SortedDescendingCellStyle BackColor="#E9EBEF" /> 
      <SortedDescendingHeaderStyle BackColor="#4870BE" /> 
     </asp:GridView> 
     <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ShoppingConnectionString %>" DeleteCommand="DELETE FROM [main_product] WHERE [P_ID] = @P_ID" InsertCommand="INSERT INTO [main_product] ([Product_name], [MRP], [Our_Prize], [Discount], [Brand], [Brand_image], [Type_of_product], [Imagepath1], [Imagepath2], [Imagepath3], [Imagepath4], [Detail], [stock], [new_arrival], [best_seller], [best_offer]) VALUES (@Product_name, @MRP, @Our_Prize, @Discount, @Brand, @Brand_image, @Type_of_product, @Imagepath1, @Imagepath2, @Imagepath3, @Imagepath4, @Detail, @stock, @new_arrival, @best_seller, @best_offer)" SelectCommand="SELECT * FROM [FO_Productos]" UpdateCommand=" Exec FOSP_ActualizarProducto @ID , @Nombre, @Descripcion , @Codigo , @Marca , @Precio , @Garantia , @AspectosTecnicos , @Fotografia1 , @Fotografia1 "> 
      <DeleteParameters> 
       <asp:Parameter Name="ID" Type="Int32" /> 
      </DeleteParameters> 
      <InsertParameters> 
       <asp:Parameter Name="Product_name" Type="String" /> 
       <asp:Parameter Name="MRP" Type="Int32" /> 
       <asp:Parameter Name="Our_Prize" Type="Int32" /> 
       <asp:Parameter Name="Discount" Type="Int32" /> 
       <asp:Parameter Name="Brand" Type="String" /> 
       <asp:Parameter Name="Brand_image" Type="String" /> 
       <asp:Parameter Name="Type_of_product" Type="String" /> 
       <asp:Parameter Name="Imagepath1" Type="String" /> 
       <asp:Parameter Name="Imagepath2" Type="String" /> 
       <asp:Parameter Name="Imagepath3" Type="String" /> 
       <asp:Parameter Name="Imagepath4" Type="String" /> 
       <asp:Parameter Name="Detail" Type="String" /> 
       <asp:Parameter Name="stock" Type="Int32" /> 
       <asp:Parameter Name="new_arrival" Type="Int32" /> 
       <asp:Parameter Name="best_seller" Type="Int32" /> 
       <asp:Parameter Name="best_offer" Type="Int32" /> 
      </InsertParameters> 
      <UpdateParameters> 
       <asp:Parameter Name="Nombre" Type="String" /> 
       <asp:Parameter Name="Precio" Type="Int32" /> 
       <asp:Parameter Name="Codigo" Type="Int32" /> 
       <asp:Parameter Name="Garantia" Type="Int32" /> 
       <asp:Parameter Name="Marca" Type="String" /> 
       <asp:Parameter Name="AspectosTecnicos" Type="String" /> 
       <asp:Parameter Name="Fotografia1" Type="String" /> 
       <asp:Parameter Name="Descripcion" Type="String" /> 
       <asp:Parameter Name="Imagepath2" Type="String" /> 
       <asp:Parameter Name="Imagepath3" Type="String" /> 
       <asp:Parameter Name="Imagepath4" Type="String" /> 
       <asp:Parameter Name="Detail" Type="String" /> 
       <asp:Parameter Name="stock" Type="Int32" /> 
       <asp:Parameter Name="new_arrival" Type="Int32" /> 
       <asp:Parameter Name="best_seller" Type="Int32" /> 
       <asp:Parameter Name="best_offer" Type="Int32" /> 
       <asp:Parameter Name="P_ID" Type="Int32" /> 
      </UpdateParameters> 
     </asp:SqlDataSource> 
     <asp:Button ID="Button1" CssClass="btn btn-primary" runat="server" Text="Back To admin Console" OnClick="Button1_Click" /> 

    </div> 
    </form> 
</body>

來源

2016-11-28 05:33:15

而且，你必須改變ConnectionString –

請使用的ExecuteNonQuery （）來更新你的表

來源

2016-11-28 06:37:17

更新GridView中的列行C＃

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