“沒有行可以添加到沒有列的DataGridView控件中。 將行添加到DataTable時，必須先添加列。

Question

嘗試將行添加到DataTable時收到以下消息：“沒有行可以添加到沒有列的DataGridView控件中。 有趣的是，我要添加行的DataTable在添加行時確實有三列。 似乎故障發生在貨幣管理器上，在行插入堆棧中逐漸減少。 這是我的代碼：

    Using DT As DataTable = Me.Tables(TableNamePrefix & " " & CStr(Index + 1))
        DT.Rows.Clear()
        DT.Columns.Clear()

        For Each LF As cLoadField In LFs
            LF.UseDefaultUnits(DispOpt.Units, DispOpt.Format)
            DT.Columns.Add(LF.Name(Cond)).Caption = LF.Name(Cond)
            If Not LF.UnitString(DispOpt) = "" Then
                DT.Columns(LF.Name(Cond)).Caption = LF.Name(Cond) & vbCrLf & LF.UnitString(DispOpt)
            End If
            If LF.FieldType = hecLoadFields.hecLF_LengthPaidOut Then LPO_Name = LF.Name(Cond)
        Next

        For Each HW As CHawser In Hawsers
            If Not Cond.Loads.NameExists(HW.Name) Then Continue For

            DR = DT.NewRow
            For Each LF As cLoadField In LFs
                LF.TankName = HW.Name
                DR(LF.Name(Cond)) = LF.Value(Cond)
            Next
            DT.Rows.Add(DR)
        Next
    End Using

這是調用堆棧：

System.Windows.Forms.dll!System.Windows.Forms.DataGridViewRowCollection.InsertInternal(int rowIndex, System.Windows.Forms.DataGridViewRow dataGridViewRow, bool force) + 0x342 bytes    
System.Windows.Forms.dll!System.Windows.Forms.DataGridView.DataGridViewDataConnection.ProcessListChanged(System.ComponentModel.ListChangedEventArgs e) + 0x5ed bytes    
System.Windows.Forms.dll!System.Windows.Forms.DataGridView.DataGridViewDataConnection.currencyManager_ListChanged(object sender, System.ComponentModel.ListChangedEventArgs e) + 0x2b bytes 
System.Windows.Forms.dll!System.Windows.Forms.CurrencyManager.OnListChanged(System.ComponentModel.ListChangedEventArgs e) + 0x15 bytes  
System.Windows.Forms.dll!System.Windows.Forms.CurrencyManager.List_ListChanged(object sender, System.ComponentModel.ListChangedEventArgs e) + 0x53e bytes   
System.Data.dll!System.Data.DataView.OnListChanged(System.ComponentModel.ListChangedEventArgs e) + 0x136 bytes  
System.Data.dll!System.Data.DataView.IndexListChanged(object sender, System.ComponentModel.ListChangedEventArgs e) + 0x1c bytes 
System.Data.dll!System.Data.DataView.IndexListChangedInternal(System.ComponentModel.ListChangedEventArgs e) + 0x47 bytes    
System.Data.dll!System.Data.DataViewListener.IndexListChanged(System.ComponentModel.ListChangedEventArgs e) + 0x3b bytes    
System.Data.dll!System.Data.Index.OnListChanged.AnonymousMethod__2(System.Data.DataViewListener listener, System.ComponentModel.ListChangedEventArgs args, bool arg2, bool arg3) + 0x7 bytes    
System.Data.dll!System.Data.Listeners<System.__Canon>.Notify<System.__Canon,bool,bool>(System.__Canon arg1, bool arg2, bool arg3, System.Data.Listeners<System.__Canon>.Action<System.__Canon,System.__Canon,bool,bool> action) + 0x90 bytes    
System.Data.dll!System.Data.Index.OnListChanged(System.ComponentModel.ListChangedEventArgs e) + 0xa4 bytes  
System.Data.dll!System.Data.Index.OnListChanged(System.ComponentModel.ListChangedType changedType, int index) + 0x38 bytes  
System.Data.dll!System.Data.Index.InsertRecord(int record, bool fireEvent) + 0xdf bytes 
System.Data.dll!System.Data.Index.ApplyChangeAction(int record, int action, int changeRecord) + 0x34 bytes  
System.Data.dll!System.Data.Index.RecordStateChanged(int record, System.Data.DataViewRowState oldState, System.Data.DataViewRowState newState) + 0x40 bytes 
System.Data.dll!System.Data.DataTable.RecordStateChanged(int record1, System.Data.DataViewRowState oldState1, System.Data.DataViewRowState newState1, int record2, System.Data.DataViewRowState oldState2, System.Data.DataViewRowState newState2) + 0xaf bytes 
System.Data.dll!System.Data.DataTable.SetNewRecordWorker(System.Data.DataRow row, int proposedRecord, System.Data.DataRowAction action, bool isInMerge, bool suppressEnsurePropertyChanged, int position, bool fireEvent, out System.Exception deferredException) + 0x540 bytes 
System.Data.dll!System.Data.DataTable.InsertRow(System.Data.DataRow row, long proposedID, int pos, bool fireEvent) + 0xf5 bytes 
System.Data.dll!System.Data.DataRowCollection.Add(System.Data.DataRow row) + 0x1a bytes 

任何幫助將不勝感激！

Answer 1

該DataTable是DataGridView的數據源，它位於應用程序的主窗體中。 事實證明，我沒有設置DataGridView的AutoGenerateColumns屬性，這是此錯誤的根源。