public class serializehelperclass serializehelper(of t)

    private sub new()sub new()
    end sub

    <system.componentmodel.editorbrowsable(componentmodel.editorbrowsablestate.advanced)> _
    public shared function itemtoxml()function itemtoxml(byval obj as t) as string
        dim mresult as string = ""
        dim mserializer as new system.xml.serialization.xmlserializer(gettype(t))
        dim mstringwriter as new system.io.stringwriter
        using mstringwriter
            mserializer.serialize(mstringwriter, obj)
            mresult = mstringwriter.tostring
            mstringwriter.close()
        end using
        return mresult
    end function

    <system.componentmodel.editorbrowsable(componentmodel.editorbrowsablestate.advanced)> _
    public shared function xmltoitem()function xmltoitem(byval xml as string) as t
        dim mserializer as new system.xml.serialization.xmlserializer(gettype(t))
        dim mstringreader as new system.io.stringreader(xml)
        return ctype(mserializer.deserialize(mstringreader), t)
    end function

    <system.componentmodel.editorbrowsable(componentmodel.editorbrowsablestate.advanced)> _
    public shared sub itemtoxmlfile()sub itemtoxmlfile(byval filename as string, byval obj as t)
        dim xmlwriter as new system.io.streamwriter(filename, false)
        using xmlwriter
            xmlwriter.write(itemtoxml(obj))
            xmlwriter.close()
        end using
    end sub

    <system.componentmodel.editorbrowsable(componentmodel.editorbrowsablestate.advanced)> _
    public shared function xmlfiletoitem()function xmlfiletoitem(byval filename as string) as t
        dim xmlreader as new system.io.streamreader(filename, system.text.encoding.default)
        dim mobj as t
        using xmlreader
            mobj = xmltoitem(xmlreader.readtoend)
            xmlreader.close()
        end using
        return mobj
    end function

    <system.componentmodel.editorbrowsable(componentmodel.editorbrowsablestate.advanced)> _
    public shared sub itemtoformatterfile()sub itemtoformatterfile(byval filename as string, byval formatter as system.runtime.serialization.iformatter, byval obj as t)
        dim mfilestream as system.io.stream = system.io.file.open(filename, system.io.filemode.create)
        using mfilestream
            formatter.serialize(mfilestream, obj)
            mfilestream.close()
        end using
    end sub

    <system.componentmodel.editorbrowsable(componentmodel.editorbrowsablestate.advanced)> _
    public shared function formatterfiletoitem()function formatterfiletoitem(byval filename as string, byval formatter as system.runtime.serialization.iformatter) as t
        dim mfilestream as system.io.stream = system.io.file.open(filename, system.io.filemode.open)
        dim mobj as t
        using mfilestream
            mobj = ctype(formatter.deserialize(mfilestream), t)
            mfilestream.close()
        end using
        return mobj
    end function

    public shared function clone()function clone(byval obj as t) as t
        dim tmpt as t
        dim mformatter as new system.runtime.serialization.formatters.binary.binaryformatter
        dim mmemorystream as new system.io.memorystream
        using mmemorystream
            mformatter.serialize(mmemorystream, obj)
            mmemorystream.position = 0
            tmpt = ctype(mformatter.deserialize(mmemorystream), t)
            mmemorystream.close()
        end using
        return tmpt
    end function

    public shared sub save()sub save(byval filename as string, byval formattype as formattype, byval obj as t)
        select case formattype
            case formattype.binary
                itemtoformatterfile(filename, new system.runtime.serialization.formatters.binary.binaryformatter, obj)
            case formattype.soap
                itemtoformatterfile(filename, new system.runtime.serialization.formatters.soap.soapformatter, obj)
            case formattype.xml
                itemtoxmlfile(filename, obj)
        end select
    end sub

    public shared function load()function load(byval filename as string, byval formattype as formattype) as t
        select case formattype
            case formattype.binary
                return formatterfiletoitem(filename, new system.runtime.serialization.formatters.binary.binaryformatter)
            case formattype.soap
                return formatterfiletoitem(filename, new system.runtime.serialization.formatters.soap.soapformatter)
            case formattype.xml
                return xmlfiletoitem(filename)
        end select
        return nothing
    end function

end class

public enum formattypeenum formattype
    xml
    binary
    soap
end enum

配置與數(shù)據(jù)文件處理類：

    public mustinherit class configinformationcollectionbaseclass configinformationcollectionbase(of tkey, tvalue)
        inherits system.collections.generic.dictionary(of tkey, tvalue)

        '默認(rèn)為formattype.binary
        private gformattype as lzmtw.formattype = lzmtw.formattype.binary
        private gfilename as string = appdomain.currentdomain.basedirectory & "{0}.dat"

        public sub read()sub read()
            read(gformattype)
        end sub

        public sub read()sub read(byval formattype as lzmtw.formattype)
            gfilename = string.format(gfilename, gettype(tvalue).name)
            read(gfilename, formattype)
        end sub

        public sub read()sub read(byval file as string, byval formattype as lzmtw.formattype)
            gfilename = file
            gformattype = formattype
            me.load()
        end sub

        public shadows sub add()sub add(byval item as tvalue)
            dim mkeyvalue as tkey = nothing
            if keynameisfield() then
                mkeyvalue = ctype(gettype(tvalue).getfield(keyname).getvalue(item), tkey)
            else
                mkeyvalue = ctype(gettype(tvalue).getproperty(keyname).getvalue(item, nothing), tkey)
            end if

            if not me.containskey(mkeyvalue) then
                '不存在,增加記錄
                mybase.add(mkeyvalue, item)
            else
                '存在,作修改處理
                me.item(mkeyvalue) = item
            end if
        end sub

        public sub save()sub save()
            dim mitems(me.count - 1) as tvalue
            me.values.copyto(mitems, 0)
            serializehelper(of tvalue()).save(gfilename, gformattype, mitems)
        end sub

        private sub load()sub load()
            if not io.file.exists(gfilename) then
                initialize()
                save()
            else
                dim mitems() as tvalue
                mitems = ctype(serializehelper(of tvalue()).load(gfilename, gformattype), tvalue())
                for each item as tvalue in mitems
                    me.add(item)
                next
            end if
        end sub

        ''' <summary>
        ''' '繼承時,若有初始賦值,在此實(shí)現(xiàn)
        ''' </summary>
        protected mustoverride sub initialize()sub initialize()

        ''' <summary>
        ''' 指定tvalue的鍵名(字段或?qū)傩?的名稱
        ''' </summary>
        protected mustoverride readonly property keyname()property keyname() as string

        ''' <summary>
        ''' 指定tvalue的鍵名是字段(真)還是屬性(假)
        ''' </summary>
        protected mustoverride readonly property keynameisfield()property keynameisfield() as boolean

        sub new()sub new()
            '檢測鍵名是否有效，鍵名的類和tkey是否相符
            if keynameisfield() then
                dim mfieldinfo as reflection.fieldinfo = gettype(tvalue).getfield(keyname)
                if mfieldinfo is nothing then
                    throw new systemexception(string.format("類{0}中不存在名稱為{1}的字段", gettype(tvalue).name, keyname))
                else
                    if not mfieldinfo.fieldtype.name.equals(gettype(tkey).name) then
                        throw new systemexception(string.format("類{0}中字段名稱為{1}的類型為{2},與指定的鍵值類型{3}不符", gettype(tvalue).name, keyname, mfieldinfo.fieldtype.name, gettype(tkey).name))
                    end if
                end if
            else
                dim mpropertyinfo as reflection.propertyinfo = gettype(tvalue).getproperty(keyname)
                if mpropertyinfo is nothing then
                    throw new systemexception(string.format("類{0}中不存在名稱為{1}的屬性", gettype(tvalue).name, keyname))
                else
                    if not mpropertyinfo.propertytype.name.equals(gettype(tkey).name) then
                        throw new systemexception(string.format("類{0}中屬性名稱為{1}的類型為{2},與指定的鍵值類型{3}不符", gettype(tvalue).name, keyname, mpropertyinfo.propertytype.name, gettype(tkey).name))
                    end if
                end if
            end if

        end sub
    end class

<serializable()> _
public class myconfiginfoclass myconfiginfo
    private mmachine as string
    private mlogins(-1) as login

    public property machine()property machine() as string
        get
            return mmachine
        end get
        set(byval value as string)
            mmachine = value
        end set
    end property

    public readonly property logins()property logins() as login()
        get
            return mlogins
        end get
    end property

    public sub add()sub add(byval login as login)
        redim preserve mlogins(mlogins.length)
        mlogins(mlogins.length - 1) = login
    end sub

    <serializable()> _
    public class loginclass login
        private muser as string
        private mpass as string

        public property user()property user() as string
            get
                return muser
            end get
            set(byval value as string)
                muser = value
            end set
        end property

        public property pass()property pass() as string
            get
                return mpass
            end get
            set(byval value as string)
                mpass = value
            end set
        end property

        sub new()sub new()
        end sub

        sub new()sub new(byval user as string, byval pass as string)
            me.user = user
            me.pass = pass
        end sub
    end class
end class

public class configdataclass configdata
    inherits configinformationcollectionbase(of string, myconfiginfo)

    protected overrides sub initialize()sub initialize()
    end sub

    protected overrides readonly property keyname()property keyname() as string
        get
            return "machine"
        end get
    end property

    protected overrides readonly property keynameisfield()property keynameisfield() as boolean
        get
            return false
        end get
    end property

end class

    private sub button3_click()sub button3_click(byval sender as system.object, byval e as system.eventargs) handles button3.click
        dim test as new configdata
        '讀文件
        test.read()
        dim item as myconfiginfo

        item = new myconfiginfo
        with item
            .machine = "fk-a01-02"
            .add(new myconfiginfo.login("lzmtw", "001"))
            .add(new myconfiginfo.login("lzm", "002"))
        end with
        test.add(item)

        item = new myconfiginfo
        with item
            .machine = "fk-a01-03"
            .add(new myconfiginfo.login("l", "003"))
            .add(new myconfiginfo.login("lz", "004"))
            .add(new myconfiginfo.login("lzmtw", "001"))
        end with
        test.add(item)
        console.writeline(test.item("fk-a01-03").logins(0).user)
        test.item("fk-a01-03").logins(0).user = "hello"

        test.save() '存盤
        '用另一個打開，看看
        dim test2 as new configdata
        test2.read()
        console.writeline(test2.item("fk-a01-03").logins(0).user)
    end sub