UpdatePanel Question

我有一个下拉菜单，其中包含来自表单加载数据库的值。我想使用下拉列表作为过滤器来使用updatepanel来更新数据网格，我设法使用它。我在表单加载中绑定了数据网格，并在选定的索引上进行了修改，如图所示。我也想使用相同的下拉菜单来更新使用DataValueField的formview，由于某些原因，它无法正常工作。原因可能是我使用了两个不同的更新面板和相同的asynchpostbacktrigger？我应该在哪里绑定数据到formview？您的意见将不胜感激！在此先感谢...UpdatePanel Question

protected void Page_Load(object sender, EventArgs e) 
{ 
     SqlConnection conn = new SqlConnection(GetConnectionString()); 
     conn.Open(); 

     SqlCommand cmd3 = new SqlCommand("SELECT c.Email As CompanyEmail, c.Telephone AS Telephone, m.Email AS AdminEmail, m.FirstName + ' ' + m.LastName AS CompanyAdmin FROM Company c, Member m WHERE m.CompanyID = c.CompanyID AND m.CompanyID = '" + company_id + "' AND m.CompanyRole = 'Admin'", conn); 
     SqlCommand cmd = new SqlCommand("SELECT CompanyName, CompanyID FROM Company ORDER BY CompanyName", conn); 
     SqlCommand cmd2 = new SqlCommand("SELECT p.ProjectName AS ProjectName, p.ProjectID, p.CompanyID, p.Status AS Status FROM Project p, Company c WHERE p.CompanyID = c.CompanyID AND c.CompanyID = '" + company_id + "' ORDER BY ProjectName", conn); 

     cmd.CommandType = CommandType.Text; 

     SqlDataAdapter da = new SqlDataAdapter(cmd); 

     DataSet ds = new DataSet(); 

     da.Fill(ds); 

     if (!Page.IsPostBack) 
     { 

      company_list.DataSource = ds; 
      company_list.DataTextField = "CompanyName"; 
      company_list.DataValueField = "CompanyID"; 
      company_list.DataBind(); 

      company_list.Items.Insert(0, new System.Web.UI.WebControls.ListItem("-- Please Select Company --")); 

     } 
     //cmd2.Connection.Open(); 

       cmd2.CommandType = CommandType.Text; 

       SqlDataAdapter sqlAdapter = new SqlDataAdapter(cmd2); 
       DataSet ds2 = new DataSet(); 
       sqlAdapter.Fill(ds2); 

       Gridview1.DataSource = ds2; 
       Gridview1.DataBind(); 

       FormView1.DataSource = cmd3.ExecuteReader(); 
       FormView1.DataBind(); 

       conn.Close(); 

      //} 
     //cmd2.Connection.Close(); 
     //cmd2.Connection.Dispose(); 
    } 

} 
protected void company_list_SelectedIndexChanged(object sender, EventArgs e) 
{ 

    company_id = company_list.SelectedValue; 

    SqlConnection conn = new SqlConnection(GetConnectionString()); 
    conn.Open(); 


    SqlCommand cmd2 = new SqlCommand("SELECT p.ProjectName AS ProjectName, p.ProjectID, p.CompanyID, p.Status AS Status FROM Project p, Company c WHERE p.CompanyID = c.CompanyID AND c.CompanyID = '" + company_id + "' ORDER BY ProjectName", conn); 


     cmd2.CommandType = CommandType.Text; 

     SqlDataAdapter sqlAdapter = new SqlDataAdapter(cmd2); 
     DataSet ds2 = new DataSet(); 
     sqlAdapter.Fill(ds2); 

     Gridview1.DataSource = ds2; 
     Gridview1.DataBind(); 

     SqlCommand cmd = new SqlCommand("SELECT c.Email As CompanyEmail, c.Telephone AS Telephone, m.Email AS AdminEmail, m.FirstName + ' ' + m.LastName AS CompanyAdmin FROM Company c, Member m WHERE m.CompanyID = c.CompanyID AND m.CompanyID = '" + company_id + "' AND m.CompanyRole = 'Admin'", conn); 
     cmd.CommandType = CommandType.Text; 

     FormView1.DataSource = cmd.ExecuteReader(); 
     FormView1.DataBind(); 

     conn.Close(); 


}

ASP.NET：

<div style="float:left;"> 
         <table> 
         <tr> 
          <td class="style1">Select Company:</td> 
          <td><asp:DropDownList ID="company_list" runat="server" 
           onselectedindexchanged="company_list_SelectedIndexChanged" width="185" AutoPostBack="true" /></td> 
         </tr> 
         <tr> 
          <td colspan="2" align="right">&nbsp;</td> 
         </tr> 
         </table> 

         <asp:UpdatePanel ID="UpdateInfo" runat="server"> 
         <ContentTemplate> 
         <asp:FormView ID="FormView1" runat="server"> 
         <ItemTemplate> 
         <table> 
         <tr> 
          <td>Company Admin:</td> 
          <td><asp:TextBox Text='<%# Eval("Email") %>' CssClass="input input1" ID="co_admin" width="150" runat="server" ReadOnly="True" /></td> 
         </tr> 
         <tr> 
          <td>Admin Email:</td> 
          <td><asp:TextBox Text='<%# Eval("AdminEmail") %>' CssClass="input input1" ID="ad_email" width="150" runat="server" ReadOnly="True" /></td> 
         </tr> 
         <tr> 
          <td>Company Email:</td> 
          <td><asp:TextBox Text='<%# Eval("CompanyEmail") %>' CssClass="input input1" ID="co_email" width="150" runat="server" ReadOnly="True" /></td> 
         </tr> 
         <tr> 
          <td>Telephone:</td> 
          <td><asp:TextBox Text='<%# Eval("Telephone") %>' CssClass="input input1" ID="telephone" width="150" runat="server" ReadOnly="True" /></td> 
         </tr> 
         <tr> 
          <td></td> 
          <td><asp:Button CssClass="button_style" width="170" ID="export" Text="EXPORT TO EXCEL" runat="server" /></td> 
         </tr> 
         </table> 
         </ItemTemplate> 
         </asp:FormView> 
         </ContentTemplate> 
         <Triggers> 
          <asp:AsyncPostBackTrigger ControlID="company_list" /> 
         </Triggers> 
         </asp:UpdatePanel> 

         </div> 

         <center> 


          <asp:UpdatePanel ID="UpdateGrid" runat="server"> 
       <ContentTemplate> 
          <asp:gridview ID="Gridview1" runat="server" ShowFooter="True" 
         AutoGenerateColumns="False" GridLines="None"> 

        <Columns> 
        <asp:TemplateField HeaderText="Project Name"> 
        <ItemTemplate> 
         <asp:TextBox Text='<%# Eval("ProjectName") %>' CssClass="input input1" ID="project_name" width="150" runat="server" ReadOnly="True"></asp:TextBox> 
        </ItemTemplate> 
        </asp:TemplateField> 

        <asp:TemplateField HeaderText="Status"> 
        <ItemStyle Width="150" /> 
        <ItemTemplate> 
         <center><asp:Image ImageUrl='<%# GetStatusImage(Eval("Status").ToString()) %>' ID="status" runat="server"/></center> 
        </ItemTemplate> 
       </ContentTemplate> 
       <Triggers> 
        <asp:AsyncPostBackTrigger ControlID="company_list" /> 
       </Triggers> 
       </asp:UpdatePanel>

来源

2011-02-26 user618616

你在哪里绑定到FormView？我看到Gridview1.DataBind（），但没有为FormView。 – 2011-02-26 02:42:01

我将更新代码... – user618616 2011-02-26 02:45:11

我试图用这个下面的代码重新创建方案。（和它的作品）

protected void Page_Load(object sender, EventArgs e) 
{ 

    var foos = GetFoos(); 
    Gridview1.DataSource = foos; 
    Gridview1.DataBind(); 

    DetailsView1.DataSource = foos; 
    DetailsView1.ChangeMode(DetailsViewMode.ReadOnly); 
    DetailsView1.DataBind(); 

    DropDownList1.Items.AddRange(foos.Select(f => new ListItem(f.Name, f.Name)).ToArray()); 
    DropDownList1.Items.Insert(0,new ListItem("-Select-")); 


} 

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) 
{ 
    var selectedValue = DropDownList1.SelectedValue; 

    var foos = GetFoos().Where(f => f.Name == selectedValue); 

    Gridview1.DataSource = foos; 
    Gridview1.DataBind(); 

    DetailsView1.DataSource = foos; 
    DetailsView1.ChangeMode(DetailsViewMode.ReadOnly); 
    DetailsView1.DataBind(); 
} 


static List<Foo> GetFoos() 
{ 
    var list = new List<Foo>(); 
    for(int i=0;i<10;i++) 
    { 
     list.Add(new Foo {City = "City" + i, Name = "Name" + i}); 
    } 
    return list; 
} 

class Foo 
{ 
    public string Name { get; set; } 

    public string City { get; set; } 
}

和这里的标记

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"> 

    <asp:ScriptManager ID="ScriptManager1" runat="server"> 
    </asp:ScriptManager> 

    <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" 
     onselectedindexchanged="DropDownList1_SelectedIndexChanged"> 
    </asp:DropDownList> 

    <asp:UpdatePanel ID="UpdatePanel1" runat="server"> 
    <ContentTemplate> 
     <asp:GridView runat="server" ID="Gridview1"> 
     </asp:GridView> 
     </ContentTemplate> 
     <Triggers> 
     <asp:AsyncPostBackTrigger ControlID="DropDownList1" /> 
     </Triggers> 
    </asp:UpdatePanel> 
    <asp:UpdatePanel ID="UpdatePanel2" runat="server"> 
    <ContentTemplate> 
     <asp:DetailsView ID="DetailsView1" runat="server" Height="50px" Width="125px"> 
     </asp:DetailsView> 

     </ContentTemplate> 
     <Triggers> 
     <asp:AsyncPostBackTrigger ControlID="DropDownList1" /> 
     </Triggers> 
    </asp:UpdatePanel> 

</asp:Content>

所以，它的东西与你有FormView控件。你能切换到使用DetailsView吗？

来源

2011-02-26 02:17:19

是的，我在表单加载和selectedindexchange绑定gridview和formview。下拉菜单是为了更新这两个更新面板... – user618616 2011-02-26 02:25:35

UpdatePanel Question

回答

相关问题