绑定gridview中的HiddenField

我想绑定一个Hidden Field，因为我想将代码后面的值传递给asp:Parameter Name="HOME_TEAM_COACH_ID" Type="Int32"。绑定gridview中的HiddenField

我的ASP：

<asp:FormView ID="FormView1" runat="server" OnItemUpdated="FormView1_ItemUpdating" > 
    <EditItemTemplate>   
     HOME_TEAM: 
     <asp:DropDownList ID="DropDownListHometeam" runat="server" 
      DataSourceID="SqlDataGetTeams" 
      DataTextField="NAME" DataValueField="ID" SelectedValue='<%# Bind("HOME_TEAM_ID") %>'> 
     </asp:DropDownList> 
     <asp:HiddenField runat="server" ID="testLabel" Value='<%# Bind("HOME_TEAM_COACH_ID") %>' /> 
    </EditItemTemplate>

和C＃的背后是：

protected void FormView1_ItemUpdating(object sender, FormViewUpdatedEventArgs e) 
{ 
    if (FormView1.CurrentMode == FormViewMode.Edit) 
    { 
     DropDownList HomeTeamId = FormView1.FindControl("DropDownListHometeam") as DropDownList;    
     string team = string.Format("{0}", HomeTeamId.Text); 
     SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["BasketballConnectionString1"].ToString()); 
     conn.Open(); 
     string queryHome = "SELECT dbo.COACH.ID, dbo.COACH.SURENAME FROM dbo.COACH INNER JOIN dbo.GAMES ON dbo.COACH.TEAM_ID = dbo.GAMES.HOME_TEAM_ID WHERE (dbo.GAMES.HOME_TEAM_ID =" + team + ")"; 
     SqlCommand cmd = new SqlCommand(queryHome, conn); 


     var Home_Coach_Id = cmd.ExecuteScalar().ToString(); 
     HiddenField HomeCoachIdLabel = FormView1.FindControl("testLabel") as HiddenField; 
     HomeCoachIdLabel.Value = Convert.ToString(Home_Coach_Id); 
     conn.Close();

我想最后四行，我想通过Home_Coach_Id值绑定asp:HiddenField ID="testLabel" Value='<%# Bind("HOME_TEAM_COACH_ID") %>'帮助。

当我点击更新时，它不会更改数据库中的值。（当我调试时，在最后一行它给了我正确的HomeCoachIdLabel.Value。）有什么建议吗？

来源

2013-11-25 Apollon

的问题是，它需要的方法预渲染，而不是onitemupdated方法。

asp:FormView ID="FormView1" runat="server" OnPreRender="FormView1_OnPreRender" >

，并在C＃

protected void FormView1_OnPreRender(object sender, FormViewUpdatedEventArgs e)

{

，当我把它放在页面加载它也可以{}。下一步是进行插入事件....

来源

2013-11-26 18:28:29 Apollon

您不需要明确设置HiddenField的Value属性，因为它是由标记中的<%# Bind("HOME_TEAM_COACH_ID") %>完成的。

我相信你的问题是，你是不是在你的SELECT语句，返回从查询到数据库HOME_TEAM_COACH_ID：

SELECT dbo.COACH.ID, dbo.COACH.SURENAME FROM dbo.COACH 
    INNER JOIN dbo.GAMES ON dbo.COACH.TEAM_ID = dbo.GAMES.HOME_TEAM_ID 
    WHERE (dbo.GAMES.HOME_TEAM_ID =" + team + ")

来源

2013-11-25 19:47:33

当我调试查询时，它返回一个int值（Id）。我需要将此值传递给数据库中的HOME_TEAM_COACH_ID列。 – Apollon

@Aolloll - 所以你需要做一个'UPDATE'而不是'SELECT'并使用'.ExecuteNonQuery（）'而不是'.ExecuteScalar（）'。 –

当我更新它执行从ASP sqldatasource这个查询：UpdateCommand =“更新游戏集AGONISTIKI = AGONISTIKI，HOME_TEAM_COACH_ID = @HOME_TEAM_COACH_ID WHERE（ID = @ ID）” – Apollon

绑定gridview中的HiddenField

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