通用分页控件(DataGrid,DataList,Repeater都可以用它来分页)
2007-12-19 07:06
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1.建立用户控件Pager.ascx
1.1 html
function callButtonEvent()
{
var keycode =window.event.keyCode;
if(keycode==13)
{
if(check()==true)
{
event.cancelBubble=true;
event.returnValue=false;
document.getElementById('<%=btnGo.ClientID%>').click();
}
}
}
function check()
{
var count = parseInt(document.getElementById('<%=lblTotal.ClientID%>').outerText);
var txt = document.getElementById('<%=txtCurrentPage.ClientID%>').value;
var cur = parseInt(txt);
if ((cur | NaN) ==0)
{
alert('Input page must format as integer.');
event.cancelPostBack=true;
return false;
}
if (cur > count || cur < 1)
{
alert('Input page no out of range.');
event.cancelPostBack=true;
return false;
}
}
1.2 cs代码
public class Pager : System.Web.UI.UserControl
{
protected System.Web.UI.WebControls.Label lblTotal;
protected System.Web.UI.WebControls.Label labOf;
protected System.Web.UI.WebControls.TextBox txtCurrentPage;
protected System.Web.UI.WebControls.Button btnGo;
protected System.Web.UI.WebControls.LinkButton btnFirstPage;
protected System.Web.UI.WebControls.LinkButton btnPrevPage;
protected System.Web.UI.WebControls.LinkButton btnNextPage;
protected System.Web.UI.WebControls.LinkButton btnLastPage;
int size=10;//可以在web.config中配置
public event System.EventHandler NavigationClick;
private void Page_Load(object sender, System.EventArgs e)
{
this.txtCurrentPage.Attributes.Add("onkeypress","callButtonEvent();");
this.btnGo.Attributes.Add("onclick","check();");
if(!this.IsPostBack)
{
SetStyle();
SetEnable();
}
}
Web Form Designer generated code#region Web Form Designer generated code
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeComponent();
base.OnInit(e);
this.btnFirstPage.Click += new System.EventHandler(this.btnGo_Click);
this.btnPrevPage.Click += new System.EventHandler(this.btnGo_Click);
this.btnNextPage.Click += new System.EventHandler(this.btnGo_Click);
this.btnLastPage.Click += new System.EventHandler(this.btnGo_Click);
this.btnGo.Click += new System.EventHandler(this.btnGo_Click);
}
/**////
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
btnGo_Click#region btnGo_Click
private void btnGo_Click(object sender, System.EventArgs e)
{
LinkButton linkbtn = sender as LinkButton;
if( null == linkbtn )//button
{
Button btn = sender as Button;
if( null == btn )
{
return;
}
else
{
int selPage = -1;
try
{
selPage =Int32.Parse(txtCurrentPage.Text);
}
catch
{
selPage = -1;
}
if (selPage > 0 && selPage <= PageCount)
{
ViewState["CurrentPageIndex"] = selPage;
}
else
{
return;
}
}
}
else//linkbutton
{
switch ( linkbtn.CommandArgument.Trim() )
{
case "First":
ViewState["CurrentPageIndex"] = 1;
break;
case "Prev":
ViewState["CurrentPageIndex"] = (CurrentPageIndex > 1) ? CurrentPageIndex - 1 : 1;
break;
case "Next":
ViewState["CurrentPageIndex"] = (PageCount > CurrentPageIndex) ? CurrentPageIndex + 1 : PageCount;
break;
case "Last":
ViewState["CurrentPageIndex"] = PageCount;
break;
default:
break;
}
}
SetEnable();//设置显示样式
if (NavigationClick!=null)//调用事件
{
NavigationClick( sender,e );
}
}
#endregion
SetStyle#region SetStyle
private void SetStyle()
{
this.btnFirstPage.Attributes["style"] = "CURSOR: hand";
this.btnLastPage.Attributes["style"] = "CURSOR: hand";
this.btnNextPage.Attributes["style"] = "CURSOR: hand";
this.btnPrevPage.Attributes["style"] = "CURSOR: hand";
}
#endregion
SetEnable#region SetEnable
// 应根据当前的CurrentPageIndex和pageCount设定哪些按钮可用
private void SetEnable()
{
this.lblTotal.Text = PageCount.ToString();
txtCurrentPage.Text =CurrentPageIndex.ToString();
btnPrevPage.Enabled = false;
btnNextPage.Enabled = false;
if( PageCount >1 )
{
btnFirstPage.Enabled = btnPrevPage.Enabled = ( CurrentPageIndex >1 );
btnNextPage.Enabled = btnLastPage.Enabled = ( CurrentPageIndex < PageCount );
}
else
{
btnFirstPage.Enabled = false;
btnLastPage.Enabled = false;
btnPrevPage.Enabled = false;
btnNextPage.Enabled = false;
}
}
#endregion
Property#region Property
//获取或设置当前显示页的索引。
public int CurrentPageIndex
{
get
{
object cpage=ViewState["CurrentPageIndex"];
int pindex=(cpage==null)?1:(int)cpage;
if(pindex>PageCount&&PageCount>0)
return PageCount;
else if(pindex<1)
return 1;
return pindex;
}
set
{
int cpage=value;
if(cpage<1)
cpage=1;
else if(cpage>this.PageCount)
cpage=this.PageCount;
ViewState["CurrentPageIndex"]=cpage;
}
}
// 获取或设置需要分页的所有记录的总数。
public int RecordCount
{
get
{
object obj=ViewState["Recordcount"];
return (obj==null)?0:(int)obj;
}
set
{
ViewState["Recordcount"]=value;
SetEnable();
}
}
// 获取当前页之后的页的总数。
public int PagesRemain
{
get
{
return PageCount-CurrentPageIndex;
}
}
// 获取或设置每页显示的项数。
public int PageSize
{
get
{
object obj=ViewState["PageSize"];
if (obj==null)
{
obj= size;
}
return (obj==null)?size:(int)obj;
}
set
{
int pageSize = value;
if (Math.Abs(pageSize) == 0)
pageSize = size;
ViewState["PageSize"]=pageSize;
}
}
// 获取在当前页之后还未显示的剩余记录的项数。
public int RecordsRemain
{
get
{
if(CurrentPageIndex
{
return RecordCount-(CurrentPageIndex*PageSize);
}
else
{
return 0;
}
}
}
// 获取所有要分页的记录需要的总页数。
public int PageCount
{
get
{return (RecordCount > 0) ? (int)Math.Ceiling((double)RecordCount/(double)PageSize) : 1;}
}
public int XRecord
{
get
{
return int.Parse( System.Configuration.ConfigurationSettings.AppSettings["XRecord"].Trim() );
}
}
#endregion Property
}2.建立DataGridPage.aspx
3.copy如下html代码
runat="server">
runat="server">
| 用户ID: | <% # DataBinder.Eval(Container.DataItem, "UserID") %> | 用户名: | <% # DataBinder.Eval(Container.DataItem, "UserName") %> |
<%
# DataBinder.Eval(Container.DataItem, "UserID")%>
# DataBinder.Eval(Container.DataItem, "UserName") %>