如何將gridview關注的行值逐個排列成網格

Question

我有一個主細節grid.when我專注於主柵格它將顯示informationn細節grid.it一次顯示一個焦點一個網格，但要保留之前的數據詳細網格和第二個關注的行數據也在網格中，這些數據是以前的數據所覆蓋的

Answer 1

您可以處理主網格的SelectedIndexChanged事件並將所選項目的datakey分隔列表。之後，重新綁定使用所有主控網格數據詳細描述這些id存儲在該列表中的數據。

<asp:GridView ID="MasterGridView" runat="server" AutoGenerateColumns="false" Caption="Master" 
     DataKeyNames="Id"> 
     <Columns> 
      <asp:CommandField ShowSelectButton="true" SelectText="Select" /> 
      <asp:BoundField HeaderText="Id" DataField="Id" /> 
      <asp:BoundField HeaderText="Name" DataField="Name" /> 
     </Columns> 
    </asp:GridView> 
    <hr /> 
    <asp:GridView ID="DetailsGridView" runat="server" AutoGenerateColumns="false" 
     DataKeyNames="Id" Caption="Details"> 
     <Columns> 
      <asp:CommandField ShowSelectButton="true" SelectText="Select" /> 
      <asp:BoundField HeaderText="Id" DataField="Id" /> 
      <asp:BoundField HeaderText="Name" DataField="Name" /> 
      <asp:BoundField HeaderText="Age" DataField="Age" /> 
     </Columns> 
    </asp:GridView> 

代碼隱藏：

private List<MyClass> MasterGridViewDataSource 
    { 
     get { return Session["MasterGridViewDataSource"] as List<MyClass>; } 
     set { Session["MasterGridViewDataSource"] = value; } 
    } 

    private List<int> SelectedIDs 
    { 
     get { return ViewState["SelectedIDs"] as List<int>; } 
     set { ViewState["SelectedIDs"] = value; } 
    } 

    protected void Page_Init(object sender, EventArgs e) 
    { 
     MasterGridView.SelectedIndexChanged += MasterGridView_OnSelectedIndexChanged; 
    } 

    protected void Page_Load(object sender, EventArgs e) 
    { 
     if (!IsPostBack) 
     { 
      var masterGridDataSource = GetMasterGridDataSource(); 
      MasterGridViewDataSource = masterGridDataSource; 
      MasterGridView.DataSource = masterGridDataSource; 
      MasterGridView.DataBind(); 

      SelectedIDs = new List<int>(); 
     } 
    } 

    private List<MyClass> GetMasterGridDataSource() 
    { 
     return (from item in Enumerable.Range(1, 10) 
       select new MyClass { Id = item, Name = string.Format("Item #{0}", item), Age = item }) 
       .ToList(); 
    } 

    void MasterGridView_OnSelectedIndexChanged(object sender, EventArgs e) 
    { 
     var selectedId = (int)MasterGridView.SelectedDataKey.Value; 
     if (!SelectedIDs.Contains(selectedId)) 
      SelectedIDs.Add(selectedId); 

     DetailsGridView.DataSource = (from item in MasterGridViewDataSource 
             join id in SelectedIDs on item.Id equals id 
             select item); 
     DetailsGridView.DataBind(); 
    } 

    [Serializable] 
    public class MyClass 
    { 
     public int Id { get; set; } 

     public string Name { get; set; } 

     public int Age { get; set; } 
    }