ASP.NET GridView與IQueryable分頁

Question

我目前使用IPagedList來有效地分頁我的數據。

當與GridView一起使用時，我可以在GridView.PageIndexChanging事件中設置頁面索引並重新綁定網格。

問題是，GridView.PageCount屬性是隻讀的，所以默認的pager只顯示1頁。

我想我將不得不推出我自己的GridView實現來解決這個問題？有沒有人得到他們已經完成的一個？

Answer 1

幫助this post我創建了我自己的自定義GridView控件，它允許我重寫尋呼機的初始化並設置記錄數。

public class CustomGridView : GridView 
{ 
    private const string _virtualItemCount = "virtualItemCount"; 
    private const string _currentPageIndex = "currentPageIndex"; 

    [Browsable(true), Category("Custom")] 
    [Description("Set the virtual item count for this grid")] 
    public int VirtualItemCount { 
     get 
     { 
      if (ViewState[_virtualItemCount] == null) 
       ViewState[_virtualItemCount] = -1; 
      return Convert.ToInt32(ViewState[_virtualItemCount]); 
     } 
     set 
     { 
      ViewState[_virtualItemCount] = value; 
     } 
    } 

    private int CurrentPageIndex 
    { 
     get 
     { 
      if (ViewState[_currentPageIndex] == null) 
       ViewState[_currentPageIndex] = 0; 
      return Convert.ToInt32(ViewState[_currentPageIndex]); 
     } 
     set 
     { 
      ViewState[_currentPageIndex] = value; 
     } 
    } 

    public override object DataSource 
    { 
     get 
     { 
      return base.DataSource; 
     } 
     set 
     { 
      base.DataSource = value; 
      this.CurrentPageIndex = this.PageIndex; 
     } 
    } 

    protected override void InitializePager(GridViewRow row, int columnSpan, PagedDataSource pagedDataSource) 
    { 
     if (CustomPaging) 
     { 
      pagedDataSource.VirtualCount = this.VirtualItemCount; 
      pagedDataSource.CurrentPageIndex = this.CurrentPageIndex; 
     } 
     base.InitializePager(row, columnSpan, pagedDataSource); 
    } 

    public bool CustomPaging { 
     get { return (this.VirtualItemCount != -1); } 
    } 
} 

然後在CustomGridView.PageIndexChanging事件，我們設定的頁面索引，並重新加載我們的數據（通過頁面索引和頁面大小，我們的資源庫法）：

protected void gvAccounts_PageIndexChanging(object sender, GridViewPageEventArgs e) 
    { 
     gvAccounts.PageIndex = e.NewPageIndex; 
     BindGrid(e.NewPageIndex, gvAccounts.PageSize); 
    } 


    protected void BindGrid(int pageIndex, int pageSize) 
    { 
     var accounts = AccountManager.GetAllAccounts<int>(pageIndex, pageSize, x=> x.AccountId); 
     gvAccounts.VirtualItemCount = accounts.TotalCount; 
     gvAccounts.DataSource = accounts; 
     gvAccounts.DataBind(); 
    } 

希望這有助於。

Answer 2

這是我用來實現分頁，裝訂和IQueryable的用時在GridView排序：http://bradoyler.com/post/399042473/using-the-asp-net-gridview-with-objectdatasource-and

希望幫助也！