vb.net 读写xml方法(1)
2024-07-10 13:00:55
供稿：网友
dim domxmldocument as system.xml.xmldocument
dim tmppath as string = apptempfilepath
dim xmlfile as string = tmppath + "/testxml.xml"
’窗体加载事件
private sub testxml_load(byval sender as system.object, byval e as system.eventargs) handles mybase.load
’读xml过程测试通过
dim domxmldocument as system.xml.xmldocument
dim tmppath as string = apptempfilepath
dim xmlfile as string = tmppath + "/testxml.xml"
dim reader as system.xml.xmlreader = nothing
try
reader = new xml.xmltextreader(xmlfile)
’reader.
while reader.read
me.lboxxml.items.add(reader.name + reader.value)
end while
catch ex as exception
msgbox(ex.message)
finally
if not (reader is nothing) then
reader.close()
end if
end try
end sub
’载入xml事件
private sub btnxmlload_click(byval sender as system.object, byval e as system.eventargs) handles btnxmlload.click
’me.lboxxml.items.clear()
’’读xml过程测试通过
’dim reader as system.xml.xmlreader = nothing
’try
’ reader = new xml.xmltextreader(xmlfile)
’ while reader.read
’ me.lboxxml.items.add(reader.name + ":" + reader.value)
’ end while
’catch ex as exception
’ msgbox(ex.message)
’finally
’ if not (reader is nothing) then
’ reader.close()
’ end if
’end try
dim ds as new dataset
try
’如果直接使用ds做datasource则不会展开datagrid，用dv则可以直接显示正确。
ds.readxml(xmlfile)
dim tb as datatable
dim dv as dataview
tb = ds.tables(0)
dv = new dataview(tb)
datagrid1.datasource = dv
’datagrid1.datamember = "testxmlmember"
’datagrid1.datamember = "employeefname"
’dim dxd as new xmldatadocument
catch ex as exception
msgbox(ex.message.tostring)
end try
end sub
’保存新建xml内容事件
private sub btnsavenew_click(byval sender as system.object, byval e as system.eventargs) handles btnsavenew.click
dim mytw as new xmltextwriter(tmppath + "/testxmlwrite.xml", nothing)
mytw.writestartdocument()
mytw.formatting = formatting.indented
mytw.writestartelement("team")
mytw.writestartelement("player")
mytw.writeattributestring("name", "george zip")
mytw.writeattributestring("position", "qb")
mytw.writeelementstring("nickname", "zippy")
mytw.writeelementstring("jerseynumber", xmlconvert.tostring(7))
mytw.writeendelement()
mytw.writeendelement()
mytw.writeenddocument()
mytw.close()
end sub
对于修改datagrid中指定内容并保存到xml中还不会,弄明白了,在vb.net与xml读写的2中写出来!
