本文主要是介绍一个完整的DataGrid分页及全选删除实例，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
前台HTML代码：
<HTML>
<HEAD>
<title></title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
<script language="javascript">
function CheckAll(form)
{
for (var i=0;i<form.elements.length;i++)
{
var e = form.elements[i];
e.checked = form.chkall.checked;
}
}
function SelectAll()
{
var len=document.Form1.elements.length;
var i;
for (i=0;i<len;i++)
{
if (document.Form1.elements[i].type=="checkbox")
{
document.Form1.elements[i].checked=true;
}
}
}
function UnSelectAll()
{
var len=document.Form1.elements.length;
var i;
for (i=0;i<len;i++)
{
if (document.Form1.elements[i].type=="checkbox")
{
document.Form1.elements[i].checked=false;
}
}
}
</script>
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<table width="100%" align="center">
<tr>
<td>
<asp:DataGrid id="DataGrid1" runat="server" PageSize="6" AllowPaging="True" AutoGenerateColumns="False"
AllowSorting="True" DataKeyField="id">
<Columns>
<asp:TemplateColumn>
<HeaderTemplate>
<input type="checkbox" οnclick="CheckAll(this.form)" id="chkall" name="chkall" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox id="cbFlag" runat="server"></asp:CheckBox>
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="id" HeaderText="记录号"></asp:BoundColumn>
<asp:TemplateColumn HeaderText="序号">
<ItemTemplate>
<%# Container.ItemIndex+1%>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="标题">
<ItemTemplate>
<%#DataBinder.Eval(Container.DataItem,"title")%>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
<PagerStyle Visible="False"></PagerStyle>
</asp:DataGrid>
</td>
</tr>
<tr>
<td>
<INPUT type="button" value="全部选择" οnclick="SelectAll()"><INPUT type="button" value="全部取消" οnclick="UnSelectAll()"><asp:Button id="btnDelete" runat="server" Text="删除"></asp:Button>
</td>
</tr>
<tr>
<td><asp:label id="lblCount" runat="server" Font-Name="verdana" Font-size="8pt"></asp:label>
<asp:label id="lblpage" runat="server" Font-Name="verdana" Font-size="8pt"></asp:label>
<asp:linkbutton id="btnFirst" οnclick="PagerButtonClick" runat="server" Font-Name="verdana" Font-size="8pt"
CssClass="a1" BorderStyle="None" CommandArgument="0" ForeColor="navy">首页</asp:linkbutton>
<asp:linkbutton id="btnPrev" οnclick="PagerButtonClick" runat="server" Font-Name="verdana" Font-size="8pt"
CssClass="a1" CommandArgument="prev" ForeColor="navy">上一页</asp:linkbutton>
<asp:linkbutton id="btnNext" οnclick="PagerButtonClick" runat="server" Font-Name="verdana" Font-size="8pt"
CssClass="a1" CommandArgument="next" ForeColor="navy">下一页</asp:linkbutton>
<asp:linkbutton id="btnLast" οnclick="PagerButtonClick" runat="server" Font-Name="verdana" Font-size="8pt"
CssClass="a1" CommandArgument="last" ForeColor="navy">尾页</asp:linkbutton>
<asp:label id="lblCurrentIndex" runat="server" Font-Name="verdana" Font-size="8pt"></asp:label>
<asp:label id="lblPageCount" runat="server" Font-Name="verdana" Font-size="8pt"></asp:label>
<asp:label id="LabTz" runat="server" Font-Name="verdana" Font-size="8pt">转到第</asp:label>
<asp:dropdownlist id="DDLpage" runat="server" AutoPostBack="True"></asp:dropdownlist>
<asp:label id="Laby" runat="server" Font-Name="verdana" Font-size="8pt"> 页</asp:label>
</td>
</tr>
</table>
</form>
</FORM>
</body>
</HTML>
后台C#代码：
private void Page_Load(object sender, System.EventArgs e)
{
if(!Page.IsPostBack)
{
BindData();
this.btnDelete.Attributes.Add("onclick", "return confirm('您确认要删除吗?');");
}
}
public void BindData()
{
string sql="select * from magfile order by id desc";
DataSet ds=webAscx.DataBase.GetDatabase(sql);
this.DataGrid1.DataSource=ds;
this.DataGrid1.DataKeyField="id";
this.DataGrid1.DataBind();
if(ds==null || ds.Tables[0].Rows.Count<=0)
lblCount.Text="共0条记录";
else
{
int RecordsCount=ds.Tables[0].Rows.Count;
lblCount.Text="共"+ RecordsCount+ "条记录";
}
lblpage.Text="每页"+DataGrid1.PageSize.ToString()+"条";
lblCurrentIndex.Text = "页次： <font color=red>" + (DataGrid1.CurrentPageIndex + 1).ToString() + "</font> /";
lblPageCount.Text = DataGrid1.PageCount.ToString() + " 页";
// 添加页次列表框
DDLpage.Items.Clear();
for (int i=1;i<=DataGrid1.PageCount;i++)
{
DDLpage.Items.Add(new ListItem(i.ToString(),i.ToString()));
}
DDLpage.Items.FindByText((DataGrid1.CurrentPageIndex+1).ToString()).Selected=true;
ShowStats();
}
private void ShowStats()
{
if (DataGrid1.CurrentPageIndex==0)
{
btnFirst.Enabled =false;
btnPrev.Enabled =false;
}
else
{
btnFirst.Enabled =true;
btnPrev.Enabled =true;
};
if (DataGrid1.CurrentPageIndex==DataGrid1.PageCount-1)
{
btnNext.Enabled =false;
btnLast.Enabled =false;
}
else
{
btnNext.Enabled =true;
btnLast.Enabled =true;
};
}
public void PagerButtonClick(object sender, EventArgs e)
{
string arg = ((LinkButton)sender).CommandArgument.ToString();
switch(arg)
{
case "next":
if (DataGrid1.CurrentPageIndex < (DataGrid1.PageCount - 1))
{
DataGrid1.CurrentPageIndex += 1;
}
break;
case "prev":
if (DataGrid1.CurrentPageIndex > 0)
{
DataGrid1.CurrentPageIndex -= 1;
}
break;
case "last":
DataGrid1.CurrentPageIndex = (DataGrid1.PageCount - 1);
break;
default:
DataGrid1.CurrentPageIndex = System.Convert.ToInt32(arg);
break;
}
BindData();
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);
this.DDLpage.SelectedIndexChanged += new System.EventHandler(this.DDLpage_SelectedIndexChanged);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void btnDelete_Click(object sender, System.EventArgs e)
{
string SelectedString = "";//定义一个变量
foreach(System.Web.UI.WebControls.DataGridItem dl in this.DataGrid1.Items)
{
for(int i=0;i<dl.Cells[0].Controls.Count;i++)//循环DataGrid的第一个单元格
{
if(dl.Cells[0].Controls[i].GetType().ToString()=="System.Web.UI.WebControls.CheckBox")//判断类型是否为CheckBox
{
if(((CheckBox)dl.Cells[0].Controls[i]).Checked==true)//如果CheckBox被选中
{
SelectedString += DataGrid1.DataKeys[dl.ItemIndex].ToString() + ",";
//因为设置了DataGrid的DataKeyField属性（编号），所以可以根据Datakeys得到选中CheckBox的那行所对应的那条记录的编号
//以逗号分隔，加入同一个字符串中
}
}
}
}
if(SelectedString!="")
{
string result="";
SelectedString = SelectedString.Substring(0,SelectedString.Length-1);//截取最后一个逗号
string[] Arr = SelectedString.Split(',');//分割字符串，放入数组中
for(int i=0;i<Arr.Length;i++)//循环数组
{
if(Arr[i].Trim()!="")//如果值不为空
{
result += Arr[i].Trim();
DeleteRecord(Int32.Parse(Arr[i].Trim()));//删除一条记录
}
}
}
BindData();
}
private void DeleteRecord(int i)
{
string strsql = "delete from magFile where id = "+ i;
webAscx.DataBase.UpdateDatabase(strsql);
BindData();
}
private void DDLpage_SelectedIndexChanged(object sender, System.EventArgs e)
{
DataGrid1.CurrentPageIndex=Convert.ToInt32(DDLpage.SelectedValue)-1;
BindData();
}
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