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asp.net webform怎么自定义分页控件的方法
时间：2022-06-25 06:56:24 编辑：袖梨 来源：一聚教程网
做web开发一直用到分页控件，自己也动手实现了个，使用用户自定义控件。
翻页后数据加载使用委托，将具体实现放在在使用分页控件的页面进行注册。
有图有真相，给个直观的认识：
自定义分页控件前台代码：
| 代码如下 | 复制代码 |
|
.pager-m-l {
margin-left: 10px;
}
.pager {
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
font-size: 14px;
color: #333;
background-color: #fff;
text-align: center;
border: 1px solid #eee;
border-radius: 5px;
height: 30px;
line-height: 30px;
margin: 10px auto;
width: 650px;
}
.font-blue {
color: #5bc0de;
}
.pager a {
color: #5bc0de;
text-decoration: none;
}
.pager a.gray {
color: #808080;
}
.pager-num {
width: 30px;
text-align: center;
}
.pager-form-control {
color: #555;
background-color: #fff;
background-image: none;
border: 1px solid #ccc;
border-radius: 4px;
-webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075);
box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075);
-webkit-transition: border-color ease-in-out .15s, -webkit-box-shadow ease-in-out .15s;
-o-transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
padding: 2px 0px;
margin: 0px 2px;
}
.pager-form-control:focus {
border-color: #66afe9;
outline: 0;
-webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, .6);
box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, .6);
}
.btn {
display: inline-block;
padding: 2px;
font-weight: normal;
text-align: center;
white-space: nowrap;
vertical-align: middle;
-ms-touch-action: manipulation;
touch-action: manipulation;
cursor: pointer;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
background-image: none;
border: 1px solid transparent;
border-radius: 4px;
}
.btn-default {
color: #333;
background-color: #fff;
border-color: #ccc;
}
当前
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条/每页
自定义分页控件后台代码： privateconststringviewStateCurrentPageIndex ="CurrentPageIndex";
privateconststringviewStateRecordCount ="RecordCount";
publicdelegatevoidPageChangedHandle();
publiceventPageChangedHandle OnPageChanged;
publicintPageSize
{
get
{
returnConvert.ToInt32(ddlPageSize.SelectedValue);
}
}
publicintCurrentPageIndex
{
set
{
ViewState[viewStateCurrentPageIndex] = value;
}
get
{
if(ViewState[viewStateCurrentPageIndex] ==null)
{
ViewState[viewStateCurrentPageIndex] = 1;
}
returnConvert.ToInt32(ViewState[viewStateCurrentPageIndex]);
}
}
publicintRecordCount
{
get
{
if(ViewState[viewStateRecordCount] ==null)
{
ViewState[viewStateRecordCount] = 0;
}
returnConvert.ToInt32(ViewState[viewStateRecordCount]);
}
set
{
ViewState[viewStateRecordCount] = value;
}
}
privateintTotalNumberOfPages
{
get
{
returnRecordCount % PageSize == 0 ? RecordCount / PageSize : (RecordCount / PageSize) + 1;
}
}
protectedvoidPage_Load(objectsender, EventArgs e)
{
if(!IsPostBack)
{
}
}
protectedvoidlabFirstPage_Click(objectsender, EventArgs e)
{
CurrentPageIndex = 1;
this.DataBind();
}
protectedvoidlabPreviousPage_Click(objectsender, EventArgs e)
{
CurrentPageIndex -= 1;
this.DataBind();
}
protectedvoidlabNextPage_Click(objectsender, EventArgs e)
{
CurrentPageIndex += 1;
this.DataBind();
}
protectedvoidlabLastPage_Click(objectsender, EventArgs e)
{
CurrentPageIndex = TotalNumberOfPages;
this.DataBind();
}
protectedvoidbtnGo_Click(objectsender, EventArgs e)
{
intpageNum = 1;
boolisNum = Int32.TryParse(txtPageNum.Text,outpageNum);
if(isNum)
{
CurrentPageIndex = Math.Min(pageNum, TotalNumberOfPages);
}
this.DataBind();
}
protectedvoidddlPageSize_SelectedIndexChanged(objectsender, EventArgs e)
{
CurrentPageIndex = 1;
this.DataBind();
}
protectedoverridevoidDataBind(boolraiseOnDataBinding)
{
BindPager();
base.DataBind(raiseOnDataBinding);
if(OnPageChanged !=null)
{
OnPageChanged();
}
}
privatevoidBindPager()
{
labCurrentPageIndex.Text = CurrentPageIndex.ToString();
labTotalNumberOfPages.Text = TotalNumberOfPages.ToString();
labRecordCount.Text = RecordCount.ToString();
SetNavigateEnabled();
}
privatevoidSetNavigateEnabled()
{
txtPageNum.Text = CurrentPageIndex.ToString();
labFirstPage.Enabled =true;
labPreviousPage.Enabled =true;
labNextPage.Enabled =true;
labLastPage.Enabled =true;
labFirstPage.CssClass ="font-blue";
labPreviousPage.CssClass ="font-blue";
labNextPage.CssClass ="font-blue";
labLastPage.CssClass ="font-blue";
if(CurrentPageIndex == 1)
{
labFirstPage.Enabled =false;
labPreviousPage.Enabled =false;
labFirstPage.CssClass ="gray";
labPreviousPage.CssClass ="gray";
}
if(CurrentPageIndex == TotalNumberOfPages)
{
labNextPage.Enabled =false;
labLastPage.Enabled =false;
labNextPage.CssClass ="gray";
labLastPage.CssClass ="gray";
}
if(RecordCount == 0)
{
labFirstPage.Enabled =false;
labPreviousPage.Enabled =false;
labFirstPage.CssClass ="gray";
labPreviousPage.CssClass ="gray";
labNextPage.Enabled =false;
labLastPage.Enabled =false;
labNextPage.CssClass ="gray";
labLastPage.CssClass ="gray";
}
}
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当前页码、总共多少条记录使用ViewState记录状态信息，因为导航控件会引起回发刷新。
分页后的数据加载，使用事件。
事件的具体实现放在使用分页控件的具体页面中，进行事件的注册。
测试分页控件的前台页面：
| 代码如下 | 复制代码 |
|
text:
| |
测试分页控件的后台代码：
| 代码如下 | 复制代码 |
|
privateconststringdtSourceViewStateKey ="dtSourceViewStateKey";
protectedvoidPage_Load(objectsender, EventArgs e)
{
if(!IsPostBack)
{
BindData(true);
}
Pager.OnPageChanged += OnPageChanged;
}
privatevoidBindData(boolbindRecordCount)
{
DataTable dtSource = GetDataSource();
var source = dtSource.AsEnumerable();
if(!string.IsNullOrEmpty(txtContent.Text.Trim()))
{
source = source.Where(w => w.Field
}
if(bindRecordCount)
{
Pager.RecordCount = source.Count();
Pager.CurrentPageIndex = 1;
Pager.DataBind();
}
gvList.DataSource = source
.Skip((Pager.CurrentPageIndex - 1) * Pager.PageSize)
.Take(Pager.PageSize)
.Select(r =>new{ id = r["id"].ToString(), text = r["text"].ToString() })
.ToList();
gvList.DataBind();
}
privatevoidOnPageChanged()
{
BindData(false);
}
privateDataTable InitDataTable()
{
DataTable dtSource =newDataTable();
DataColumn id =newDataColumn("id");
id.AutoIncrement =true;
id.AutoIncrementSeed = 1;
dtSource.Columns.Add(id);
dtSource.Columns.Add("text");
for(inti = 1; i <= 1000; i++)
{
DataRow dr = dtSource.NewRow();
dr["text"] ="内容"+ i;
dtSource.Rows.Add(dr);
}
returndtSource;
}
privateDataTable GetDataSource()
{
if(ViewState[dtSourceViewStateKey] ==null)
{
ViewState[dtSourceViewStateKey] = InitDataTable();
}
returnViewState[dtSourceViewStateKey]asDataTable;
}
protectedvoidbtnQuery_Click(objectsender, EventArgs e)
{
BindData(true);
}
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在Page_Load中注册翻页后的事件。