C# GridView 排序及分页

如果你在GridView控件上设置 AllowPaging="true" or AllowSorting="true" 而没有使用使用数据源控件 DataSource (i.e. SqlDataSource, ObjectDataSource),运行则会出现下列错误:

当你在GridView控件上单击下一页时:

The GridView 'GridViewID' fired event PageIndexChanging which wasn't handled.

当你点击排序时,则回出现:

The GridView 'GridViewID' fired event Sorting which wasn't handled.

如果你没有设置GridView的DataSourceID 的属性,你必须添加一个操作才可以排序及分页。。



  点这里查看下面的例子




<%@ Page Language="C#" %>

<%@ Import Namespace="System.Data" %>

<%@ Import Namespace="System.Data.OleDb" %>

 

<script runat="server">    

    private 
void PopulatePublishersGridView()

    
{

        string connectionString 
= AccessConnectionString();

        OleDbConnection accessConnection 
= new OleDbConnection(connectionString);

 

        string sqlQuery 
= "SELECT [PubID], [Name], [Company Name], [Address], [City], [State], [Zip], [Telephone], [Fax], [Comments] FROM Publishers ORDER BY [Name] ASC;";

 

        OleDbCommand accessCommand 
= new OleDbCommand(sqlQuery, accessConnection);

 

        OleDbDataAdapter publishersDataAdapter 
= new OleDbDataAdapter(accessCommand);

        DataTable publishersDataTable 
= new DataTable("Publishers");

        publishersDataAdapter.Fill(publishersDataTable);

 

        
int dataTableRowCount = publishersDataTable.Rows.Count;

 

        
if (dataTableRowCount > 0)

        
{

            gridViewPublishers.DataSource 
= publishersDataTable;

            gridViewPublishers.DataBind();

        }


    }


 

    private string AccessConnectionString()

    
{

        string accessDatabasePath 
= Server.MapPath("~/App_Data/biblio.mdb");

        
return String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};", accessDatabasePath);

    }


 

    private string GridViewSortDirection

    
{

        get 
return ViewState["SortDirection"] as string ?? "ASC"; }

        set 
{ ViewState["SortDirection"= value; }

    }


 

    private string GridViewSortExpression

    
{

        get 
return ViewState["SortExpression"] as string ?? string.Empty; }

        set 
{ ViewState["SortExpression"= value; }

    }


 

    private string GetSortDirection()

    
{

        
switch (GridViewSortDirection)

        
{

            
case "ASC":

                GridViewSortDirection 
= "DESC";

                
break;

 

            
case "DESC":

                GridViewSortDirection 
= "ASC";

                
break;

        }


 

        
return GridViewSortDirection;

    }


 

    protected 
void gridViewPublishers_PageIndexChanging(object sender, GridViewPageEventArgs e)

    
{

        gridViewPublishers.DataSource 
= SortDataTable(gridViewPublishers.DataSource as DataTable, true);

        gridViewPublishers.PageIndex 
= e.NewPageIndex;

        gridViewPublishers.DataBind();

    }


 

    protected DataView SortDataTable(DataTable dataTable, bool isPageIndexChanging)

    
{

        
if (dataTable != null)

        
{

            DataView dataView 
= new DataView(dataTable);

            
if (GridViewSortExpression != string.Empty)

            
{

                
if (isPageIndexChanging)

                
{

                    dataView.Sort 
= string.Format("{0} {1}", GridViewSortExpression, GridViewSortDirection);

                }


                
else

                
{

                    dataView.Sort 
= string.Format("{0} {1}", GridViewSortExpression, GetSortDirection());

                }


            }


            
return dataView;

        }


        
else

        
{

            
return new DataView();

        }


    }


 

    protected 
void gridViewPublishers_Sorting(object sender, GridViewSortEventArgs e)

    
{

        GridViewSortExpression 
= e.SortExpression;

        
int pageIndex = gridViewPublishers.PageIndex;

        gridViewPublishers.DataSource 
= SortDataTable(gridViewPublishers.DataSource as DataTable, false);

        gridViewPublishers.DataBind();

        gridViewPublishers.PageIndex 
= pageIndex;

    }


 

    protected 
void Page_Load(object sender, EventArgs e)

    
{

        PopulatePublishersGridView();

    }


 

</script>


 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    
<title>GridView Sorting/Paging without a DataSourceControl DataSource</title>

</head>

<body>

    
<form id="form" runat="server">

        
<div>

            
<asp:GridView ID="gridViewPublishers" AllowPaging="true" AllowSorting="true" AutoGenerateColumns="false"

                EmptyDataText
="No records found" PagerSettings-Mode="NumericFirstLast" PageSize="25"

                OnPageIndexChanging
="gridViewPublishers_PageIndexChanging" OnSorting="gridViewPublishers_Sorting"

                runat
="server">

                
<AlternatingRowStyle BackColor="LightGray" />

                
<HeaderStyle BackColor="Gray" Font-Bold="true" Font-Names="Verdana" Font-Size="Small" />

                
<PagerStyle BackColor="DarkGray" Font-Names="Verdana" Font-Size="Small" />

                
<RowStyle Font-Names="Verdana" Font-Size="Small" />

                
<Columns>

                    
<asp:BoundField DataField="PubID" HeaderText="Publisher ID" SortExpression="PubID" />

                    
<asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />

                    
<asp:BoundField DataField="Company Name" HeaderText="Company Name" SortExpression="Company Name" />

                    
<asp:BoundField DataField="Address" HeaderText="Address" SortExpression="Address" />

                    
<asp:BoundField DataField="City" HeaderText="City" SortExpression="City" />

                    
<asp:BoundField DataField="State" HeaderText="State" SortExpression="State" />

                    
<asp:BoundField DataField="Zip" HeaderText="Zip" SortExpression="Zip" />

                    
<asp:BoundField DataField="Telephone" HeaderText="Telephone" SortExpression="Telephone" />

                    
<asp:BoundField DataField="Fax" HeaderText="Fax" SortExpression="Fax" />

                    
<asp:BoundField DataField="Comments" HeaderText="Comments" SortExpression="Comments" />

                
</Columns>

            
</asp:GridView>

        
</div>

    
</form>

</body>

</html>

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