在.NET将dataset输出为.CSV文件的方法...

最新推荐文章于 2022-09-12 15:08:42 发布

原创最新推荐文章于 2022-09-12 15:08:42 发布 · 1k 阅读

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文章标签：

#dataset #.net #datagrid #integer #string #exception

本文介绍了一种使用Visual Basic .NET将DataSet转换为CSV文件的方法。通过遍历DataSet中的数据并进行适当的格式调整（例如移除逗号和回车符），可以确保数据正确输出到CSV文件中。

在.NET将dataset输出为.CSV文件的方法...

注意移除','和'回车符'

Imports System.Configuration
Imports System.Data
Imports System.Data.OleDb
Imports Logonexperss.CustomerOnline.DBHelper
Imports System.IO
Public Class excle
    Inherits System.Web.UI.Page

#Region " Web Form Designer Generated Code "

    'This call is required by the Web Form Designer.
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

    End Sub
    Protected WithEvents DataGrid1 As System.Web.UI.WebControls.DataGrid

    'NOTE: The following placeholder declaration is required by the Web Form Designer.
    'Do not delete or move it.
    Private designerPlaceholderDeclaration As System.Object

    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: This method call is required by the Web Form Designer
        'Do not modify it using the code editor.
        InitializeComponent()
    End Sub

#End Region

    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        bind()
    End Sub

    Private Sub bind()
        Dim ds As DataSet
        DBHelper.ConnectString = ConfigurationSettings.AppSettings.Item("Database.ConnectionString")
        ds = DBHelper.RunSelect("select * from TrialSent")
        Dim dt As DataTable = ds.Tables(0)
        DataTableToExcel(dt)
        'DataGrid1.DataSource = ds
        'DataGrid1.DataBind()
    End Sub

    Public Sub DataTableToExcel(ByVal dt As DataTable)
        Try
            If dt Is Nothing OrElse dt.Rows.Count < 1 Then
                Return
            End If
            '分隔符
            Dim strSplitChar As String = String.Empty
            strSplitChar = ","
            Dim sw As New System.IO.StringWriter
            Dim strTemp As String = String.Empty
            Dim num As Integer = dt.Columns.Count - 1
            For i As Integer = 0 To num
                '输出头
                If i <> dt.Columns.Count - 1 Then
                    strTemp += dt.Columns(i).ColumnName + strSplitChar
                Else
                    strTemp += dt.Columns(i).ColumnName
                End If
            Next
            sw.WriteLine(strTemp)

            strTemp = ""
            For i As Integer = 0 To dt.Rows.Count - 1
                '输出内容 ,注意移除','和'回车符'
                For j As Integer = 0 To num
                    If j <> dt.Columns.Count - 1 Then
                        strTemp += dt.Rows(i)(j).ToString().Replace(",", "").Replace(Chr(13) & Chr(10), "") + strSplitChar

                    Else
                        strTemp += dt.Rows(i)(j).ToString()
                    End If
                Next
                sw.WriteLine(strTemp)
                strTemp = ""
            Next
            sw.Close()
            Response.AddHeader("Content-Disposition", "attachment; filename=test.csv")
            Response.ContentType = "application/ms-excel"
            Response.Write(sw)
            Response.End()

        Catch ex As Exception
            Throw ex

        End Try
    End Sub
End Class