使用vb.net将数据网格转换为xml文件 [英] data grid to xml file using vb.net

问题描述

datagrid中的数据应保存在单独的文件中.
该文件必须显示用户在数据网格中输入的每日数据
使用此代码，xml文件中的数据将覆盖旧文件并仅显示新文件.
请帮帮我.

data in datagrid should be saved in separate file.
the file must show daily data where user entered in data grid
with this code the data in xml file is overwriting the old one and showing only new file.
please help me.

Public Sub SwipeDTBind(ByVal EmplId As String)
        Try
            Dim ds As DataSet
            ds = New DataSet
            ds.Clear()
            ds.ReadXml("EmployeeTimeCard_1.XML")

            Dim dtbl As DataTable = ds.Tables(0)

            ds.Tables(0).DefaultView.Sort = "EmployeeId DESC"

            Dim dv As DataView = New DataView(dtbl)
            dv.RowFilter = "EmployeeId = '" & EmplId & "'"
            dv.Sort = "LoginTime"
            dtbl.Columns(0).ColumnMapping = MappingType.Hidden

            dtbl.Columns(1).ColumnMapping = MappingType.Hidden
            ds.WriteXml("E:\Syscom\EmployeeTimeCard\EmployeeTimeCard_1.XML", XmlWriteMode.IgnoreSchema)
            dgSwipedt.DataSource = dv

        Catch ex As Exception
            Me.ErrorLog(ex.Message.ToString())
        End Try
    End Sub

推荐答案

如果要使用单独的文件，请指定单独的文件名.

If you want that is separate file then specify separate file name.

ds.WriteXml("E:\Syscom\EmployeeTimeCard\EmployeeTimeCard_" & Now.ToString("ddMMyyyyHHmmss") & ".XML", XmlWriteMode.IgnoreSchema)

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