让Asp.NET的DataGrid可排序、可选择、可分页
李洪根
李洪根
<form id="Form1" method="post" runat="server">
<asp:datagrid id="dgOrder" runat="server" Height="515px"
Width="718px" AutoGenerateColumns="False" AllowSorting="True" CellPadding="4"
BorderWidth="1px" BorderColor="#A0ABEB" PageSize="15" BorderStyle="Solid"
BackColor="White" GridLines="Vertical" ForeColor="Black" AllowPaging="True"
ShowFooter="True">
<SelectedItemStyle ForeColor="White"
BackColor="Black"></SelectedItemStyle>
<AlternatingItemStyle
BackColor="#EEEEEE"></AlternatingItemStyle>
<HeaderStyle HorizontalAlign="Center" ForeColor="White"
BorderColor="#6876C5" BackColor="#6876C5"></HeaderStyle>
<FooterStyle ForeColor="White"
BackColor="#6876C5"></FooterStyle>
<Columns>
<asp:TemplateColumn>
<ItemTemplate>
<FONT face="">
<asp:CheckBox id="Cb"
runat="server"></asp:CheckBox></FONT>
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="orderid"
SortExpression="orderid" HeaderText="ID">
<HeaderStyle Width="180px"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="ShipCountry"
SortExpression="ShipCountry" HeaderText="ShipCountry">
<HeaderStyle Width="180px"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="ShippedDate"
SortExpression="ShippedDate" HeaderText="ShippedDate"
DataFormatString="{0:d}">
<HeaderStyle Width="180px"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="Freight"
SortExpression="Freight" HeaderText="Freight">
<HeaderStyle Width="180px"></HeaderStyle>
</asp:BoundColumn>
<asp:BoundColumn DataField="ShipAddress"
SortExpression="ShipAddress" HeaderText="ShipAddress">
<HeaderStyle Width="480px"></HeaderStyle>
</asp:BoundColumn>
</Columns>
<PagerStyle HorizontalAlign="Center" ForeColor="Black"
Position="TopAndBottom" BackColor="White"
Mode="NumericPages"></PagerStyle>
</asp:datagrid>
</form>
'得到数据视图，参数为要排序的列
Private Function GetDv(ByVal strSort As String) As DataView
'定义数据库连接
Dim dv As DataView
Dim CN As New SqlConnection()
Try
'初始化连接字符串
CN.ConnectionString = "data source=pmserver;
initial catalog=Northwind;persist security info=False;user id=sa;Password=sa;"
CN.Open()
'从NorthWind得到orders表的数据
Dim adp As SqlDataAdapter = New SqlDataAdapter("select * from orders", CN)
Dim ds As New DataSet()
adp.Fill(ds)
'得到数据视图
dv = ds.Tables(0).DefaultView
Catch ex As Exception
#If DEBUG Then
Session("Error") = ex.ToString()
Response.Redirect("../error.aspx") '跳转程序的公共错误处理页面
#End If
Finally
'关闭连接
CN.Close()
End Try
'排序
dv.Sort = strSort
Return dv
End Function
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
Handles MyBase.Load
If Not IsPostBack Then
ViewState("strSort") = "orderid"
dgOrder.DataSource = GetDv(ViewState("strSort").ToString())
dgOrder.DataBind()
End If
End Sub
'排序
Private Sub dgOrder_SortCommand(ByVal source As Object,
ByVal e As System.Web.UI.WebControls.DataGridSortCommandEventArgs) Handles dgOrder.SortCommand
dgOrder.CurrentPageIndex = 0
'得到排序的列
ViewState("strSort") = e.SortExpression.ToString()
dgOrder.DataSource = GetDv(ViewState("strSort").ToString())
dgOrder.DataBind()
End Sub
'分页
Private Sub dgOrder_PageIndexChanged(ByVal source As Object,
ByVal e As System.Web.UI.WebControls.DataGridPageChangedEventArgs) Handles dgOrder.PageIndexChanged
'得到分页的页号
dgOrder.CurrentPageIndex = e.NewPageIndex
dgOrder.DataSource = GetDv(ViewState("strSort").ToString())
dgOrder.DataBind()
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
Handles Button1.Click
Dim item As DataGridItem
Dim StrScript As String
StrScript = "<script language=javascript>alert('"
'循环表格的项，FindControl
For Each item In Me.dgOrder.Items
If CType(item.FindControl("cb"), System.Web.UI.WebControls.CheckBox).Checked Then
Try
StrScript += item.Cells(1).Text & Space(2)
Catch ex As Exception
End Try
End If
Next
StrScript += "被选择！')</script>"
RegisterClientScriptBlock("系统消息", StrScript)
End Sub
