將Excel數據導入GridView

下面是我的代碼，我成功地將數據從Excel導入到GridView。將Excel數據導入GridView

問題是我有兩個列時間&說明。當我導入到GridView某些描述數據沒有完全導入到GridView時，某些文本缺失。意味着在Excel

小時說明 1 abcdefghijklmnopqrstuuudddd

在GridView的

小時說明 1 ABCDEFGHIJKLMNO

文字是退出大周圍64個字，其inludes所有字符也喜歡2

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="WebForm1.aspx.vb" Inherits="WebApplication49.WebForm1" %> 

<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<title>Read and Display Data From an Excel File (.xsl or .xlsx) in ASP.NET</title> 
</head> 
<body> 
<form id="form1" runat="server"> 
<div> 
<b>Please Select Excel File: </b> 
<asp:FileUpload ID="fileuploadExcel" runat="server" />&nbsp;&nbsp; 
<asp:Button ID="btnImport" runat="server" Text="Import Data" OnClick="btnImport_Click" /> 
<br /> 
<asp:Label ID="lblMessage" runat="server" Visible="False" Font-Bold="True" ForeColor="#009933"></asp:Label><br /> 
<asp:GridView ID="grvExcelData" runat="server"> 
<HeaderStyle BackColor="#df5015" Font-Bold="true" ForeColor="White" /> 
</asp:GridView> 
</div> 
</form> 
</body> 
</html>

VB.Net code

Imports System.Data 
Imports System.Data.OleDb 
Imports System.IO 

Partial Class WebForm1 
Inherits System.Web.UI.Page 
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) 
    End Sub 

    Protected Sub btnImport_Click(ByVal sender As Object, ByVal e As EventArgs) 
     Dim connString As String = "" 
     Dim strFileType As String = ".xls" 
     Dim path__1 As String = "c:\ccc.xls" 
     'Connection String to Excel Workbook 

     If strFileType.Trim() = ".xls" Then 
      connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & path__1 & ";Extended Properties=""Excel 8.0;HDR=Yes;IMEX=2""" 
     ElseIf strFileType.Trim() = ".xlsx" Then 
      connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & path__1 & ";Extended Properties=""Excel 12.0;HDR=Yes;IMEX=2""" 
     End If 

     Dim query As String = "SELECT [Hours (hr)],[Description] FROM [sheet1$]" 
     Dim conn As New OleDbConnection(connString) 

     If conn.State = ConnectionState.Closed Then 
      conn.Open() 
     End If 

     Dim cmd As New OleDbCommand(query, conn) 
     Dim da As New OleDbDataAdapter(cmd) 
     Dim ds As New DataSet() 

     da.Fill(ds) 
     grvExcelData.DataSource = ds.Tables(0) 
     grvExcelData.DataBind() 
     da.Dispose() 
     conn.Close() 
     conn.Dispose() 
    End Sub 
End Class

來源

2015-06-16 user3069097

所有的值都是相同的類型嗎？例如，如果ado檢測到一列是數字而不是找到的字符串，它不會導入這些行 – jurhas

親愛的所有行都被導入，但是一些行不是重要的d。說明欄的becoz是否有這種類型的數據（從4.5「到2 7/8」）？請幫助。 – user3069097

我沒有解釋它不好。它全部導入，但如果不具有相同的數據類型，它將會是NULL。如果你有一列（2,3,4,4/5「，5），它會導入（2,3,4，NULL，5），因爲他檢測到該列是數字，但是4/5「它不會成功。 – jurhas

所以我寫了一些東西。這個代碼是特定於Postgres的（如果你可以選擇，這將是一個非常不錯的選擇，否則採取Firebird，它也是一個非常好的DB，但是你應該將插入指令拆分成很多「插入」

Imports ADODB 
Public Class ExcelToPostgres 
Implements XToY 


Dim cn As ADODB.Connection 
Dim o As OleDb.OleDbConnection 
Dim _Serials As ArrayList 
Private _Txt As New System.Text.StringBuilder("") 
Private _ForeignsTxt As New System.Text.StringBuilder("") 
Private _Q As Boolean 'Quote all 
Private p_Database As New ArrayList 
Private P_Definition As Boolean = True 
Private P_Data As Boolean = True 
Private h_TAbles As SortedList(Of String, DBTable) 
Private Quoter As New DbQuoter(dbEnum.ePostgres) 

Public Property SetTables(ByVal Name As String) As Boolean Implements XToY.SetTables 
    Get 
     Return (h_TAbles(Name).IsSelected) 

    End Get 
    Set(ByVal value As Boolean) 
     h_TAbles(Name).IsSelected = value 
    End Set 
End Property 
Public Property UseQuotes As Boolean Implements XToY.UseQuotes 
    Get 
     Return _Q 
    End Get 
    Set(ByVal value As Boolean) 
     _Q = value 
    End Set 
End Property 

Public ReadOnly Property Tables() As SortedList(Of String, DBTable) Implements XToY.Tables 

    Get 
     Return h_TAbles 

    End Get 

End Property 
Public Property Definition As Boolean Implements XToY.Definition 
    Set(ByVal value As Boolean) 
     P_Definition = value 
    End Set 
    Get 
     Return P_Definition 
    End Get 
End Property 
Public Property Data As Boolean Implements XToY.Data 
    Set(ByVal value As Boolean) 
     P_Data = value 
    End Set 
    Get 
     Return P_Data 
    End Get 
End Property 
Sub New(ByVal dbpath As String, ByVal user As String, ByVal password As String) 
    Dim strCn As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _ 
     "Data Source=" & dbpath & ";Extended Properties=Excel 8.0" 
    ';Extended Properties=Excel 8.0;HDR=Yes;IMEX=1 
    o = New OleDb.OleDbConnection(strCn) 

    o.Open() 

    LoadTables() 

End Sub 
    Private Sub LoadTables() 
    Dim dt As DataTable 
    Dim ch() As Char = {"'", Chr(34), " "} 

    dt = o.GetOleDbSchemaTable(OleDb.OleDbSchemaGuid.Tables, Nothing) 


    h_TAbles = New SortedList(Of String, DBTable) 
    Dim dbt As DBTable 
    For Each row As DataRow In dt.Rows 
     Dim tablename As String = DirectCast(row("TABLE_NAME"), String) 


     If tablename.Trim(ch).EndsWith("$") Then 
      dbt = New DBTable() 
      dbt.Name = tablename 
      dbt.DBTarget = "Postgres" 
      dbt.IsSelected = True 

      h_TAbles.Add(tablename, dbt) 
     End If 
    Next 



    LoadColumns() 

End Sub 
Private Sub LoadColumns() 
    Dim dt As DataTable 
    Dim dv As DataView 
    Dim c As ColumnTable 
    For Each d As KeyValuePair(Of String, DBTable) In h_TAbles 
     dt = o.GetOleDbSchemaTable(OleDb.OleDbSchemaGuid.Columns, New String() {Nothing, Nothing, d.Key, Nothing}) 

     dv = dt.DefaultView 
     dv.Sort = "ORDINAL_POSITION" 

     For i As Integer = 0 To dv.Count - 1 
      c = New ColumnTable 
      c.Name = dv.Item(i).Item("COLUMN_NAME") 
      c.NewName = QuoteName(dv.Item(i).Item("COLUMN_NAME")) 
      c.Type = Me.TypeAsString(dv.Item(i).Item("DATA_TYPE"), c.IsAutoincrement) 
      Select Case dv.Item(i).Item("DATA_TYPE") 
       Case 7, 8, 200, 201, 202, 203, 129, 130, 72, 129, 130, 32770 
        c.NeedQuote = True 
        c.NeedQuoteUserSetting = True 
      End Select 
      c.IsAutoincrement = False 
      c.IsNullable = True 
      c.IsSelected = True 

      d.Value.Columns.Add(c) 
     Next 
    Next 

End Sub 

Public Function Export() As String Implements XToY.Export 

    _Txt = New System.Text.StringBuilder("") 
    For Each a As KeyValuePair(Of String, DBTable) In h_TAbles 

     If a.Value.IsSelected Then 
      Me.CreateTables(a.Key) 
      _Txt.Append(vbNewLine) 
     End If 

    Next 
    ' _Txt.Append(_ForeignsTxt.ToString) 
    Return _Txt.ToString 

End Function 

Private Sub CreateTables(ByVal Table As String) 

    Dim sTable As String = QuoteName(Table) 

    If Definition Then 
     _Txt.Append(String.Format("DO $$DECLARE r record; {0}" & _ 
       "BEGIN {0}" & _ 
       " FOR r IN SELECT conname, c.relname as tTab {0}" & _ 
       " FROM pg_constraint ct {0}" & _ 
       " inner join pg_class c on c.oid= ct.conrelid {0}" & _ 
       " inner join pg_class c1 on c1.oid= ct.confrelid {0}" & _ 
       " where contype='f' AND c1.relname ='{1}' {0}" & _ 
       " LOOP {0}" & _ 
       "  EXECUTE 'ALTER TABLE ' || quote_ident(r.ttab) || ' DROP CONSTRAINT ' || quote_ident(r.conname); {0}" & _ 
       " END LOOP; {0}" & _ 
       "END$$; {0}", vbNewLine, sTable)) 

     _Txt.Append("DROP TABLE IF EXISTS ") 
     _Txt.Append(sTable) 
     _Txt.Append(";") 
     _Txt.Append(vbNewLine) 
     _Txt.Append("CREATE TABLE IF NOT EXISTS ") 
     _Txt.Append(sTable) 
     _Txt.Append(" (") 

     CreateColumns(Table) 

     'CreateConstraints(Table) 
     '_Txt.Append(vbNewLine) 

     _Txt.Append("); ") 
     _Txt.Append(vbNewLine) 
     _Txt.Append(vbNewLine) 
    End If 
    If Data Then 
     _Serials = New ArrayList 
     Me.DataPump(Table) 
     _Txt.Append(vbNewLine) 
     For i = 0 To Me._Serials.Count - 1 
      _Txt.Append("Select setval(pg_get_serial_sequence('") 
      _Txt.Append(sTable) 
      _Txt.Append("','") 
      '_Txt.Append(Chr(34)) 
      _Txt.Append(_Serials(i)) 
      '_Txt.Append(Chr(34)) 
      _Txt.Append("'), (Select max(") 

      _Txt.Append(QuoteName(_Serials(i))) 
      _Txt.Append(") from ") 
      _Txt.Append(sTable) 

      _Txt.Append(")); ") 
      _Txt.Append(vbNewLine) 
     Next 


    End If 
End Sub 
Private Sub CreateColumns(ByVal idTable As String) 

    Dim b As Boolean = False 

    With h_TAbles(idTable) 
     For i As Integer = 0 To .Columns.Count - 1 
      With CType(.Columns(i), ColumnTable) 
       If .IsSelected Then 
        If b Then 
         _Txt.Append(",") 
        Else 
         b = True 
        End If 
        _Txt.Append(vbNewLine) 
        _Txt.Append(.NewName) 
        _Txt.Append(" ") 
        If .IsAutoincrement Then 
         _Serials.Add(.NewName) 

        Else 
         _Txt.Append(.Type) 
        End If 


        _Txt.Append(" ") 
        If .DefaultValue <> "" Then 
         _Txt.Append(" DEFAULT ") 
         _Txt.Append(.DefaultValue) 
        End If 

        If Not .IsNullable Then _Txt.Append(" NOT NULL") 



       End If 

      End With 
     Next 
    End With 


End Sub 


Private Function TypeAsString(ByVal InternalId As Integer, ByVal isautoincrement As Boolean) As String 
    Select Case InternalId 
     Case 2, 16, 17, 18 

      Return " smallint " 
     Case 3, 19 
      If isautoincrement Then Return " Serial " 
      Return " int " 
     Case 4 
      Return " real " 
     Case 5 
      Return " double precision " 
     Case 6 
      Return " Money " 
     Case 7 
      Return " timestamp " 
     Case 8, 200, 201, 202, 203 
      Return " text " 
     Case 11 
      Return " boolean " 
     Case 72 
      Return " uuid " 
     Case 128 
      Return " bytea " 
     Case 129, 130 
      Return " text " 
     Case 131 
      Return " numeric " 
     Case 32769, 20, 21 
      If isautoincrement Then Return " bigserial " 

      Return " BIGINT " 
     Case 32771 
      Return " BLOB " 
     Case 32770 
      Return " TEXT " 
     Case Else 
      Throw New InvalidConstraintException("Type ID=" & InternalId & " Not Recognized") 
    End Select 
End Function 
Private Sub CreateConstraints(ByVal idTable As String) 

    Dim rsTbl, rsPk As Recordset 
    rsTbl = cn.OpenSchema(SchemaEnum.adSchemaTableConstraints, _ 
          New Object() {Nothing, Nothing, Nothing, Nothing, Nothing, idTable, Nothing}) 
    rsPk = cn.OpenSchema(SchemaEnum.adSchemaPrimaryKeys, New Object() {Nothing, Nothing, idTable}) 
    Dim i As Integer 
    _Txt.Append(vbNewLine) 
    If Not rsPk.EOF Then 'primary key 
     _Txt.Append(",") 
     _Txt.Append(vbNewLine) 

     _Txt.Append("CONSTRAINT ") 
     rsTbl.Filter = "CONSTRAINT_TYPE='PRIMARY KEY'" 
     _Txt.Append(Chr(34)) 
     _Txt.Append(idTable) 
     _Txt.Append("_") 
     _Txt.Append(rsTbl.Fields("CONSTRAINT_NAME").Value) 
     _Txt.Append(Chr(34)) 
     _Txt.Append(" PRIMARY KEY(") 
     i = 1 
     rsPk.Filter = "ORDINAL=" & i 
     Do Until rsPk.EOF 
      If i > 1 Then _Txt.Append(",") 

      _Txt.Append(QuoteName(rsPk.Fields("COLUMN_NAME").Value)) 
      i = i + 1 
      rsPk.Filter = "ORDINAL=" & i 

     Loop 
     _Txt.Append(")") 
    End If 
    rsPk.Close() 
    _Txt.Append(vbNewLine) 


End Sub 



Private Sub DataPump(ByVal idTable As String) 

    Dim dt As DataTable 
    'Dim dv As DataView 
    Dim hsh As New Hashtable 
    dt = o.GetOleDbSchemaTable(OleDb.OleDbSchemaGuid.Columns, New String() {Nothing, Nothing, idTable, Nothing}) 
    For k As Integer = 0 To dt.Rows.Count - 1 
     hsh.Add(dt.Rows(k).Item("COLUMN_NAME"), dt.Rows(k).Item("DATA_TYPE")) 
    Next 


    'Dim ch() As Char = {"'", " ", Chr(34)} 
    'Dim ch2() As Char = {Chr(34)} 
    Dim st As String = idTable '.Trim(ch) 
    If Left(st, 1) = Chr(34) Then st = Mid(st, 2, Len(st) - 2) 
    If st.EndsWith("$") Then st = Left(st, Len(st) - 1) 

    Dim sTable As String = QuoteName(st) 
    Dim tbl As DBTable 
    Dim i As Integer 
    Dim b As Boolean = False 
    Dim qryString As New System.Text.StringBuilder("") 

    tbl = h_TAbles(idTable) 

    If tbl.IsQuery Then 
     qryString.Append(tbl.QueryString) 
    Else 
     qryString.Append("SELECT ") 

     For i = 0 To tbl.Columns.Count - 1 
      If tbl.Columns(i).IsSelected Then 
       If b Then qryString.Append(",") 
       qryString.Append("[") 
       'If Left(tbl.Columns(i).Name, 1) = Chr(34) Then 
       ' qryString.Append(Mid(tbl.Columns(i).Name, 2, Len(tbl.Columns(i).Name) - 2)) 
       'Else 
       qryString.Append(tbl.Columns(i).Name) 
       'End If 

       qryString.Append("]") 
       b = True 
      End If 
     Next 
     qryString.Append(" FROM ") 
     qryString.Append("[") 
     qryString.Append(idTable) 
     qryString.Append("]") 
    End If 


    'Dim oComm As New OleDb.OleDbCommand("Select * From [" & idTable & "]", o) 
    Dim oDat As OleDb.OleDbDataAdapter = New OleDb.OleDbDataAdapter(qryString.ToString, o) 
    dt = New DataTable 
    oDat.Fill(dt) 

    Dim InsertString As New System.Text.StringBuilder("INSERT INTO ") 
    InsertString.Append(sTable) 
    InsertString.Append("(") 
    b = False 

    For i = 0 To tbl.Columns.Count - 1 
     If tbl.Columns(i).IsSelected Then 
      If b Then InsertString.Append(",") 
      InsertString.Append(tbl.Columns(i).NewName) 
      b = True 
     End If 
    Next 
    InsertString.Append(") VALUES ") 

    Dim ci As New System.Globalization.CultureInfo("en-US") 
    System.Threading.Thread.CurrentThread.CurrentCulture = ci 
    Dim h As Boolean 
    Dim clmName As String 
    b = False 
    _Txt.Append(InsertString.ToString) 
    For i = 0 To dt.Rows.Count - 1 
     If b Then 
      _Txt.Append(",") 
     Else 
      b = True 
     End If 

     _Txt.Append(vbNewLine) 
     _Txt.Append("(") 
     h = False 
     For j As Integer = 0 To tbl.Columns.Count - 1 
      If tbl.Columns(j).IsSelected Then 
       If h Then 
        _Txt.Append(", ") 
       Else 
        h = True 
       End If 


       clmName = tbl.Columns(j).Name '.Trim(ch) 

       If TypeOf (dt.Rows(i).Item(clmName)) Is DBNull Then 
        _Txt.Append("NULL") 
       ElseIf tbl.Columns(j).NeedQuote <> tbl.Columns(j).NeedQuoteUserSetting Or Not hsh.Contains(clmName) Then 

        _Txt.Append(Me.PrepareCustomString(dt.Rows(i).Item(clmName), tbl.Columns(j).Type, tbl.Columns(j).NeedQuoteUserSetting)) 
       Else 
        _Txt.Append(Me.PrepareDataString(dt.Rows(i).Item(clmName), hsh.Item(clmName))) 
       End If 
      End If 


     Next 
     _Txt.Append(")") 

    Next 

    _Txt.Append(";") 


End Sub 
Private Function PrepareCustomString(ByVal Dr As String, Type As String, NeedQuote As Boolean) As String 
    Dim Typetxt As New System.Text.StringBuilder 
    Select Case Type 
     Case "DATETIME", "TIMESTAMP" 
      Typetxt.Append(" to_timestamp('") 
      Typetxt.Append(CType(Dr, DateTime).ToString("dd-MM-yyy hh:mm:ss")) 
      Typetxt.Append("','dd-MM-yyy hh24:mi:ss')") 
     Case "DATE" 
      Typetxt.Append(" to_timestamp('") 

      Typetxt.Append(CType(Dr, DateTime).ToString("dd-MM-yyy")) 
      Typetxt.Append("','dd-MM-yyy')") 


     Case "TIME" 
      Typetxt.Append(" to_timestamp(('") 

      Typetxt.Append(CType(Dr, DateTime).ToString("hh:mm:ss")) 
      Typetxt.Append("','hh24:mi:ss')") 
     Case "YEAR" 
      Typetxt.Append(" to_timestamp('") 

      Typetxt.Append(CType(Dr, DateTime).ToString("yyyy")) 
      Typetxt.Append("','yyyy')") 
     Case Else 
      If NeedQuote Then 
       Typetxt.Append("'") 
       Dim s As String = Dr 
       For i As Integer = 0 To s.Length - 1 
        Typetxt.Append(s(i)) 
        If s(i) = "'" Then Typetxt.Append("'") 
       Next 
       Typetxt.Append("'") 
      Else 
       Typetxt.Append(Dr.Replace(",", ".")) 
      End If 
    End Select 
    Return Typetxt.ToString 
End Function 

Private Function NeedGrave(ByVal IDType As Integer) As String 
    Select Case IDType 
     Case 8, 200, 201, 202, 203, 129, 130, 32770, 7, 11 
      Return "'" 
     Case Else 
      Return "" 

    End Select 
End Function 
Private Function PrepareDataString(ByVal Dr As Object, ByVal dt As ADODB.DataTypeEnum) As String 



    'DataType Enum  |Value |Access        |SQLServer     |Oracle  
    '-------------------------------------------------------------------------------------------------------- 
    'adBigInt   |20  |         |BigInt      |   
    'adBinary   |128 |         |Binary      |Raw *  
    '     |  |         |TimeStamp     |   
    'adBoolean   |11  |YesNo        |Bit      |   
    'adChar    |129 |         |Char      |Char  
    'adCurrency   |6  |Currency       |Money      |   
    '     |  |         |SmallMoney     |   
    'adDate    |7  |Date        |DateTime     |   
    'adDBTimeStamp  |135 |DateTime       |DateTime     |Date  
    '     |  |         |SmallDateTime    |   
    'adDecimal   |14  |         |       |Decimal * 
    'adDouble   |5  |Double        |Float      |Float  
    'adGUID    |72  |ReplicationID      |UniqueIdentifier   |   
    'adIDispatch  |9  |         |       |   
    'adInteger   |3  |AutoNumber       |Identity     |Int *  
    '     |  |Integer       |Int      |   
    '     |  |Long        |       |   
    'adLongVarBinary |205 |OLEObject       |Image      |Long Raw * 
    '     |  |         |       |Blob  
    'adLongVarChar  |201 |Memo        |Text      |Long *  
    '     |  |Hyperlink       |       |Clob  
    'adLongVarWChar  |203 |Memo        |NText (SQL Server 7.0 +) |NClob  
    '     |  |Hyperlink       |       |   
    'adNumeric   |131 |Decimal       |Decimal     |Decimal 
    '     |  |         |Numeric     |Integer 
    '     |  |         |       |Number  
    '     |  |         |       |SmallInt 
    'adSingle   |4  |Single        |Real      |   
    'adSmallInt   |2  |Integer       |SmallInt     |   
    'adUnsignedTinyInt |17  |Byte        |TinyInt     |   
    'adVarBinary  |204 |ReplicationID      |VarBinary     |   
    'adVarChar   |200 |Text        |VarChar     |VarChar 
    'adVariant   |12  |         |Sql_Variant    |VarChar2 
    'adVarWChar   |202 |Text        |NVarChar     |NVarChar2 
    'adWChar   |130 |         |NChar      |  
    Dim DataString As New System.Text.StringBuilder("") 
    Select Case dt 
     Case 0 
      DataString.Append("NULL") 
     Case 2, 3, 16, 17, 18 'int,small end big 
      DataString.Append(Dr) 
     Case 4, 5, 6, 131 'float,double 
      DataString.Append(Dr.ToString.Replace(",", ".")) 
     Case 7 'datetime 
      DataString.Append("to_timestamp('") 

      DataString.Append(CType(Dr, DateTime).ToString("dd-MM-yyy hh:mm:ss")) 
      DataString.Append("','dd-MM-yyy hh24:mi:ss')") 
     Case 8, 200, 201, 202, 203, 129, 130, 32770 'varchar 
      DataString.Append("'") 
      Dim s As String = Dr 
      For i As Integer = 0 To s.Length - 1 
       DataString.Append(s(i)) 
       If s(i) = "'" Then DataString.Append("'") 
      Next 
      DataString.Append("'") 

     Case 72 'guid 
      DataString.Append(Dr) 
     Case 11 'bit 
      DataString.Append("'") 
      If Dr = "0" Then 
       DataString.Append("False") 
      ElseIf Dr = "-1" Then 
       DataString.Append("True") 
      Else 
       DataString.Append(Dr) 
      End If 

      DataString.Append("'") 
     Case 32768 'uniqueidentifier it should never come here 
      DataString.Append(Dr) 
     Case 32771 'blob 
      DataString.Append(Dr) 
     Case 128 
      DataString.Append("decode('") 

      DataString.Append(Convert.ToBase64String(Dr)) 
      DataString.Append("','base64')") 

     Case Else 
      Throw New InvalidConstraintException("Type ID=" & dt & " Not Recognized") 
    End Select 
    Return DataString.ToString 
End Function 



Public ReadOnly Property Databases As ArrayList Implements XToY.Databases 
    Get 
     Return Me.p_Database 
    End Get 
End Property 
Public Property Database As String Implements XToY.Database 

    Get 
     Return "" 
    End Get 
    Set(val As String) 

    End Set 
End Property 
Public Sub AddQueries(qryName As String, qryDefinition As String) Implements XToY.AddQueries 
    Dim odr As New OleDb.OleDbDataAdapter(qryDefinition, o) 
    Dim tbl As New DBTable 
    tbl.Name = qryName 
    tbl.IsQuery = True 
    tbl.QueryString = qryDefinition 
    tbl.DBTarget = "Postgres" 
    odr.Fill(tbl.Datatable) 
    tbl.TranslateToTable() 

    For i As Integer = 0 To tbl.Columns.Count - 1 

     tbl.Columns(i).NewName = QuoteName(tbl.Columns(i).Name) 
    Next 

    odr.Dispose() 

    h_TAbles.Add(qryName, tbl) 
End Sub 
Public Property Schema As String Implements XToY.Schema 
    Get 
     Return "" 
    End Get 
    Set(value As String) 

    End Set 
End Property 
Public ReadOnly Property schemas As ArrayList Implements XToY.Schemas 
    Get 
     Dim i As New ArrayList 
     Return i 
    End Get 
End Property 
Private Function QuoteName(ByVal st As String) As String 
    Dim cha() As Char = {"'", Chr(34), " ", "$", "`"} 
    st = st.Trim(cha) 
    st = st.Replace("/", "_").Replace("\", "_").Replace(".", "_") 
    Return Quoter.QuoteNamePG(st, UseQuotes) 
End Function 
Private Function EscapeName(ByVal st As String) As String 
    Dim s As New System.Text.StringBuilder 

    Dim cha() As Char = {"'", Chr(34), " ", "$", "`"} 

    st = st.Trim(cha) 
    st = st.Replace("/", "_").Replace("\", "_").Replace(".", "_") 
    For i As Integer = 0 To st.Length - 1 
     s.Append(st(i)) 
     If st(i) = "'" Then s.Append("'") 
    Next 
    Return s.ToString 
End Function 
End Class

它來自一個程序，所以忽略這些實現。有兩個訪問點New，它們打開連接並加載表的模式，另一個是創建SQL指令的Execute（）。你需要什麼...

來源

2015-06-16 10:52:31 jurhas

親愛的我搜索的內容是在一列中只有255個字符，同時從Excel導入數據到網格視圖。如何增加這個尺寸。請幫忙。 – user3069097

我不明白你在想什麼。訪問和我認爲也很好，長字符串使用另一種數據類型。備忘錄。獲取Excel的模式（按照上面的例程LoadColumns（）的步驟並填充一個數據網格）查看在所需的列上提供了哪種類型，並與我的代碼中的表進行比較。如果是文本，它不會採取備忘錄，我真的不知道如何設置它，特別是如果有可能。 – jurhas

將Excel數據導入GridView

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