Sub Page_Load(Src As Object, E As EventArgs)
If Not (IsPostBack)
DataLoad("isbn")
End If
End Sub
Sub DataLoad(parmsort as string)
Dim ds As New DataSet
Dim FS As New FileStream(Server.MapPath("books.xml"), FileMode.Open)
ds.ReadXml(FS)
MyDataGrid.DataSource = new DataView(ds.Tables(0))
MyDataGrid.DataBind()
FS.close()
END SUB
Sub DataSort(Src As Object, E As DataGridSortCommandEventArgs)
' Bug if we sort, then Edit Item Becomes Wrong
IF MyDataGrid.EditItemIndex=-1 THEN
DataLoad(e.sortexpression)
ELSE
response.write ("Can't sort until editing is done!")
END IF
End Sub
Sub DataDelete(Sender As Object, E As DataGridCommandEventArgs)
DIM deletekey as string
IF MyDataGrid.EditItemIndex=-1 THEN
deletekey=MyDataGrid.DataKeys(CInt(E.Item.ItemIndex))
response.write ("deleted " & deletekey)
ELSE
response.write ("Can't delete until editing is done!")
END IF
END SUB
Sub DataEdit(Sender As Object, E As DataGridCommandEventArgs)
DIM editkey as string
MyDataGrid.EditItemIndex = Cint(E.Item.ItemIndex)
editkey=MyDataGrid.DataKeys(CInt(E.Item.ItemIndex))
'response.write ("To Be Edited" & editkey)
DataLoad("")
End Sub
Sub DataCancel(Sender As Object, E As DataGridCommandEventArgs)
MyDataGrid.EditItemIndex = -1
response.write ("edit was cancelled")
DataLoad("")
End Sub
Sub DataUpdate(Sender As Object, E As DataGridCommandEventArgs)
DIM editkey as string
MyDataGrid.EditItemIndex = -1
editkey = MyDataGrid.DataKeys(CInt(E.Item.ItemIndex))
response.write ("To Be Updated " & editkey)
DataLoad("")
' howmanycols = E.Item.Cells.Count
End Sub
</script>
<body>
<h3><font face="Verdana">The Best Books Ever</font>
<span runat="server" id="MySpan"/></h3>
<form runat="server">
<ASP:DataGrid id="MyDataGrid" runat="server"
AllowSorting="true"
OnSortCommand="DataSort"
OnDeleteCommand="DataDelete"
OnEditCommand="DataEdit"
OnCancelCommand="DataCancel"
OnUpdateCommand="DataUpdate"
DataKeyField="isbn"
Width="100%"
BackColor="white"
BorderColor="black"
ShowFooter="false"
CellPadding=3
CellSpacing="0"
Font-Name="Verdana"
Font-Size="8pt"
Headerstyle-BackColor="lightblue"
Headerstyle-Font-Size="10pt"
Headerstyle-Font-Style="bold"
MaintainState="true"
>
<Columns>
<asp:ButtonColumn Text="Delete Book" CommandName="Delete"/>
<asp:EditCommandColumn EditText="Edit" CancelText="Cancel" UpdateText="Update" ItemStyle-Wrap="false"/>
</columns>
</ASP:DataGrid>
</form>
</body>
</html>
xml的源文件：
<books>
<book>
<isbn>0070653623</isbn>
<author>Jack Trout, Steve Rivkin</author>
<title>The Power of Simplicity</title>
<category>selfhelp</category>
<comments>A Real Fun Read</comments>
</book>
<book>
<isbn>0887306667</isbn>
<author>Al Reiss, Jack Trout</author>
<title>22 Immutable Laws of Marketing</title>
<category>marketing</category>
<comments>This team offers more profound advice about creating world class marketing campaigns that will be viable for a hundred years.</comments>
</book>
<book>
<isbn>0887309372</isbn>
<author>Al Reiss, Laura Reiss</author>
<title>22 Immutable Laws of Branding</title>
<category>marketing</category>
<comments>This book is great for people who used 22 Immutable Laws of Marketing to build a brand and now want to strengthen that brand.</comments>
</book>
<book>
<isbn>0679757651</isbn>
<author>Tom Peters</author>
<title>Circle of Innovation</title>
<category>marketing</category>
<comments>His most recent book is his best by far!</comments>
</book>
<book>
<isbn>0884270610</isbn>
<author>Eli Goldthrait</author>
<title>The Goal</title>
<category>management</category>
<comments>Advocate of Theory of Constraints as applied to managment and optimization.</comments>
</book>
<book>
<isbn>068485600X</isbn>
<author>Jeff Cox, Howard Stevens</author>
<title>Selling the Wheel</title>
<category>management</category>
<comments>Excellent Treatise/Novel on the entire Sales Cycle</comments>
</book>
<book>
<isbn>0672316498</isbn>
<author>Alan Cooper</author>
<title>The Inmates Are Running The Asylum</title>
<category>management</category>
<comments>The father of Visual Basic and creator of the new art of Interaction Design - very valuable in designing websites. Basically the worlds most cutting edge thinker in User Interface design aimed at simplifying software use.</comments>
</book>
</books>
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