DataGrid自定义分页存储过程
存储过程代码：
CREATE proc page
@RecordCount int output,
@QueryStr nvarchar(100)='table1',--表名、视图名、查询语句
@PageSize int=20, --每页的大小(行数)
@PageCurrent int=1, --要显示的页
@FdShow nvarchar (1000)='*', --要显示的字段列表
@IdentityStr nvarchar (100)='id', --主键
@WhereStr nvarchar (200)='1=1 and id % 11111 = 0',
@FdOrder nvarchar(100)='id', --排序
@isReturn bit=0
as
declare
@sql nvarchar(2000)
set @sql = ''
if @WhereStr = '' begin
set @WhereStr = '1=1'
end
declare @tsql nvarchar(200)
if(@isReturn=1)begin
set @tsql=N'select @RecordCount = count(*) from ' + @QueryStr + ' where ' + @WhereStr
exec sp_executesql @tsql,N'@RecordCount int output',@RecordCount output
end
else begin
set @RecordCount = @PageSize * @PageCurrent + 1
end
if @PageCurrent = 1 begin
set @sql = 'select top ' + cast(@PageSize as nvarchar(3)) + ' ' + @FdShow + ' from ' + @QueryStr + ' where ' + @WhereStr + ' order by ' + @IdentityStr
end
else begin
set @sql = 'select top ' + cast(@PageSize as nvarchar(3)) + ' ' + @FdShow + ' from ' + @QueryStr + ' where ' + @WhereStr + ' and ' + @IdentityStr + '> ( select max(' + @IdentityStr + ') from (select top ' + cast(@PageSize*(@PageCurrent-1) as nvarchar(10)) + ' ' + @IdentityStr + ' from ' + @QueryStr + ' where ' + @WhereStr + ' order by ' + @IdentityStr + ') as t) order by ' + @IdentityStr
end
if @FdOrder <>'' and @FdOrder<>@IdentityStr begin
set @sql = 'select * from (' + @sql + ') as t4867435348493 order by ' + @FdOrder
end
--print @sql
execute(@sql)
GO
后台代码：
protected System.Web.UI.WebControls.DataGrid DataGrid1;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
if(!Page.IsPostBack)
{
DataGrid1DataBind(1);
}
}
private void DataGrid1DataBind(int page)
{
SqlConnection conn = new SqlConnection("server=qq;uid=sa;pwd=***;database=testdb");
SqlCommand cmd = new SqlCommand("page",conn);
cmd.CommandType = CommandType.StoredProcedure;
SqlParameter p1 = cmd.Parameters.Add("@RecordCount",SqlDbType.Int);
p1.Direction = ParameterDirection.Output;
SqlParameter p = cmd.Parameters.Add("@PageCurrent",SqlDbType.Int);
p.Value = page;
SqlDataAdapter da = new SqlDataAdapter();
DataSet ds = new DataSet();
da.SelectCommand = cmd;
da.Fill(ds);
DataGrid1.DataSource = ds.Tables[0].DefaultView;
int count = int.Parse(cmd.Parameters["@RecordCount"].Value.ToString());
if(null == ViewState["page"] || "" == ViewState["page"].ToString())
{
ViewState["page"] = count.ToString();
}
else
{
count = int.Parse(ViewState["page"].ToString());
}
DataGrid1.VirtualItemCount = count;
DataGrid1.DataBind();
}
private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
{
DataGrid1.CurrentPageIndex = e.NewPageIndex;
DataGrid1DataBind(e.NewPageIndex + 1);
}