vb.net如何导入界面 用vb做一个登录界面

vb.net怎样把excel内容导入到datagridview

解题思路：

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把EXCEL看做数据源来连接。

用一个list来显示EXCEL中的所有表，选择指定表名，打开EXCEL到DG

——————————如下：

引用ADODB 2.8

导入：

Imports System.Data

Imports System.Data.Odbc

Imports System.Data.OleDb

申明

Private Excelpath As String

Public conn As New ADODB.Connection

Public rs As New ADODB.Recordset

创建conn

Public Sub connDB(ByVal filePath As String)

On Error Resume Next

Dim strConnString As String = "Provider=microsoft.ace.oledb.12.0;Data Source=" filePath ";Extended Properties='Excel 12.0; HDR=yes;IMEX=1';"

conn.ConnectionString = strConnString

conn.CursorLocation = ADODB.CursorLocationEnum.adUseClient

conn.Open()

End Sub

Public Function 获取电子表集合(filePath) As List(Of String)

Dim ConnStr As String = "Provider=microsoft.ace.oledb.12.0;Data Source=" filePath ";Extended Properties='Excel 12.0; HDR=no;IMEX=1';"

Dim list As New List(Of String)()

Dim Conn2 As New OleDbConnection(ConnStr)

Try

If Conn2.State = ConnectionState.Closed Then

Conn2.Open()

End If

Dim dt As DataTable = Conn2.GetSchema("Tables")

For Each row As DataRow In dt.Rows

If row(3).ToString() = "TABLE" Then

list.Add(row(2).ToString())

End If

Next

Catch e As Exception

'Throw e

Finally

If Conn2.State = ConnectionState.Open Then

Conn2.Close()

End If

Conn2.Dispose()

End Try

Return list

End Function

//////////////////

开始打开指定EXCEL到DG

Call connDB(Excelpath)

Dim sqlstr As String = "select * from [" Me.ListBox1.Text "]"

With rs

If rs.State 0 Then rs.Close()

.CursorLocation = ADODB.CursorLocationEnum.adUseClient

.Open(sqlstr, conn, ADODB.CursorTypeEnum.adOpenKeyset, ADODB.LockTypeEnum.adLockOptimistic)

If Not rs.EOF And Not rs.BOF Then

Dim da As New System.Data.OleDb.OleDbDataAdapter

Dim ds As New DataSet

da.Fill(ds, rs, "注册表")

DG.DataSource = Nothing

DG.DataSource = ds.Tables(0)

DG.Refresh()

End If

End With

vb.net text导入datagridview

假设文本文件如你例子，每行2个数据，数据之间用逗号分隔；

'用StreamReader打开指定的文本文件进行读操作

Dim r As New System.IO.StreamReader(Application.StartupPath "\123.TXT")

Dim i As Integer

Dim s As String

Dim d() As String

i = -1

Do While r.Peek -1 '是否到文件尾

s = r.ReadLine '从打开的文件中读取一行内容

d = Split(s, ",")

DataGridView1.Rows.Add()

i = i + 1

'把一行数据写入网格控件的一个行里

DataGridView1.Item(0, i).Value = d(0)

DataGridView1.Item(1, i).Value = d(1)

Loop

r.Close() '关闭对象

vb.net 将excel中数据显示到软件界面

给你看一段我的代码

Public xlApp As Excel.Application

Public xlBook As Excel.Workbook

Public xlSheet As Excel.Worksheet

xlApp = CreateObject("Excel.Application") '创建EXCEL对象

xlBook = xlApp.Workbooks.Open(OpenFileDialog1.FileName) '打开已经存在的EXCEL工件簿文件

xlSheet = xlBook.Worksheets(xlBook.Sheets(1).name) '读取excel

'****************************读取excel数据，显示在数据表上****************************************

DataGridView1.Rows.Clear() '清空记录

For i = 5 To 19

If xlSheet.Cells(i, 1).value "" Then

DataGridView1.Rows.Add(xlSheet.Cells(2, 9).value, xlSheet.Cells(i, 1).value, xlSheet.Cells(2, 2).value, xlSheet.Cells(2, 7).value, xlSheet.Cells(2, 4).value, CDate(DateTimePicker1.Value), "", xlSheet.Cells(i, 5).value, Combo_CZZ.Text, Combo_MacName.Text, "", xlSheet.Cells(1, 3).value, xlSheet.Cells(1, 6).value, "", Combo_BanCi.Text, "")

End If

Next

VB.NET怎样实现导入导出文本文件

用System.IO.StreamReader类可以读各类文本文件，用System.IO.StreamWriter 类则可以写各类文本文件，从而实现导入导出文本文件功能。这两个类均支持各类编码格式（默认的是Unicode和UTF-8）。

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