sqlBulkCopy: Der angegebene Wert des Typs String aus der Datenquelle kann nicht in den Typ int der angegebenen Zielspalte konvertiert werden.

Question

Ich versuche, Werte aus Rasterzeilen in Datenspalte zu speichern und dann sqlBulkCopy zum Einfügen der Daten in meine Datenbank zu verwenden .

Mein gridview Design-Sets gemäß folgenden:

<asp:GridView ID="gvDCR" runat="server" Width="100%" AutoGenerateColumns="false" 
 
     HeaderStyle-HorizontalAlign="Center" HeaderStyle-VerticalAlign="Middle" OnRowDeleting="OnRowDeleting"> 
 
     <Columns>    
 
      <asp:BoundField DataField="UserID" HeaderText="Name of User" ItemStyle-CssClass="Column_Hide" HeaderStyle-CssClass="Column_Hide"></asp:BoundField> 
 
      <asp:BoundField DataField="Date" HeaderText="Date"></asp:BoundField> 
 
      <asp:BoundField DataField="Cluster" HeaderText="Cluster"></asp:BoundField> 
 
      <asp:BoundField DataField="Drcode" HeaderText="Code" ItemStyle-CssClass="Column_Hide" HeaderStyle-CssClass="Column_Hide"></asp:BoundField> 
 
      <asp:BoundField DataField="Act_name" HeaderText="Customer"></asp:BoundField> 
 
      <asp:BoundField DataField="Ordno" HeaderText="Order No."></asp:BoundField> 
 
      <asp:BoundField DataField="OrdAmt" HeaderText="Order Amount"></asp:BoundField> 
 
      <asp:BoundField DataField="Remarks" HeaderText="Remarks"></asp:BoundField> 
 
      <asp:CommandField ShowDeleteButton="True" ButtonType="Button" ItemStyle-HorizontalAlign="Center" ItemStyle-VerticalAlign="Middle" /> 
 
     </Columns> 
 
    </asp:GridView>

Meine gridview Row speichert die Daten nach folgenden:

Private Sub btnInsertData_Click(sender As Object, e As EventArgs) Handles btnInsertData.Click 
    Dim dt As DataTable = DirectCast(ViewState("Customers"), DataTable) 
    Dim sOrdAmt As String 
    dt.Rows.Add(Trim(txtInf.Text), Trim(txtDt.Text), ddlCluster.SelectedValue, ddlCustomer.SelectedValue, ddlCustomer.SelectedItem, Trim(txtOrdNo.Text), Trim(sOrdAmt), Trim(txtRemarks.Text)) 
    ViewState("Customers") = dt 
    Try 
     Me.BindGrid() 
     lblMsg.Text = "Data Loaded Successfully" 
     lblMsg.ForeColor = System.Drawing.Color.Green 
    Catch ex As Exception 
     lblMsg.Text = "Exception occured: " & ex.Message 
     lblMsg.ForeColor = System.Drawing.Color.Red 
    End Try 
End Sub 

Dies ist, wie ich versuche, Daten instert in die Datenbank von der GridView-Zeile zur Datenspalte und Datenspalte zur Datenbank:

Private Sub btnUpload_Click(sender As Object, e As EventArgs) Handles btnUpload.Click 
    Dim dtu As New DataTable 
    dtu.Columns.AddRange(New DataColumn(7) {New DataColumn("dUserId", GetType(String)), New DataColumn("dDate", GetType(Date)), New DataColumn("dCluster", GetType(String)), New DataColumn("dDRCODE", GetType(String)), New DataColumn("dAct_Name", GetType(String)), New DataColumn("dOrdNo", GetType(String)), New DataColumn("dOrdAmt", GetType(String)), New DataColumn("dRemarks", GetType(String))}) 
    For Each row As GridViewRow In gvDCR.Rows 
    Try 
     Dim dUserid As String = row.Cells(0).Text 
     Dim dDate As Date = row.Cells(1).Text 
     Dim dCluster As String = row.Cells(2).Text 
     Dim dDrcode As String = row.Cells(3).Text 
     Dim dOrdNo As String = row.Cells(5).Text 
     Dim dOrdAmt As Int32 = System.Convert.ToInt32(row.Cells(6).Text) 
     Dim dRemarks As String = row.Cells(8).Text 

     dtu.Rows.Add(dUserid, dDate, dCluster, dDrcode, dOrdNo, dOrdAmt, dRemarks) 
     lblMsg.Text = "Data is ready to upload..!" 
     lblMsg.ForeColor = System.Drawing.Color.Green 
    Catch ex As Exception 
     lblMsg.Text = "Exception occured during checking of data: " & ex.Message 
     lblMsg.ForeColor = System.Drawing.Color.Red 
    End Try 
    Next 
    If dtu.Rows.Count > 0 Then 
     Using con As New SqlConnection(strConnection) 
     Using sqlBulkCopy As New SqlBulkCopy(con) 
      sqlBulkCopy.DestinationTableName = "dbo.dwr" 
      sqlBulkCopy.ColumnMappings.Add("dUserId", "dwr_for") 
      sqlBulkCopy.ColumnMappings.Add("dDate", "dwr_dt") 
      sqlBulkCopy.ColumnMappings.Add("dCluster", "block") 
      sqlBulkCopy.ColumnMappings.Add("dDrcode", "drcode") 
      sqlBulkCopy.ColumnMappings.Add("dOrdNo", "order_no") 
      sqlBulkCopy.ColumnMappings.Add("dOrdAmt", "ord_amt") 
      sqlBulkCopy.ColumnMappings.Add("dRemarks", "remarks") 
      con.Open() 
      Try 
      sqlBulkCopy.WriteToServer(dtu) 
      lblMsg.Text = "Data successfully updated into database." 
      lblMsg.ForeColor = System.Drawing.Color.Green 
      Catch ex As Exception 
      lblMsg.Text = "Exception occured during upload: " & ex.Message 
      lblMsg.ForeColor = System.Drawing.Color.Red 
      End Try 
      con.Close() 
     End Using 
     End Using 
    End If 
    End Sub 

und der Datentyp der Tabelle nach folgenden:

CREATE TABLE [dbo].[dwr](
    [dwr_id] [int] IDENTITY(1,1) NOT NULL, 
    [dwr_dt] [date] NULL, 
    [dwr_for] [nvarchar](50) NULL, 
    [block] [int] NULL, 
    [drcode] [nvarchar](6) NULL, 
    [visited] [bit] NULL, 
    [order_no] [nvarchar](10) NULL, 
    [ord_amt] [float] NULL, 
    [coll_amt] [float] NULL, 
    [remarks] [nvarchar](max) NULL, 
    [updated_on] [datetime] NULL, 
CONSTRAINT [PK_dwr] PRIMARY KEY CLUSTERED 
(
    [dwr_id] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY] 

sein nun dem Fehler als „Ausnahme beim Upload aufgetreten zeigt: Der angegebene Wert vom Typ String aus der Datenquelle eingeben werden kann, nicht konvertiert int der angegebenen Zielspalte "

Irgendeine Idee über, was diesen Fehler verursacht?

Answer 1

Verwenden Sie den folgenden Code. Mag sein, dass es dir hilft. Ich habe den Datentyp der dCluster-Spalte in Ganzzahl geändert.

Private Sub btnUpload_Click(sender As Object, e As EventArgs) Handles btnUpload.Click 
Dim dtu As New DataTable 
dtu.Columns.AddRange(New DataColumn(7) {New DataColumn("dUserId", GetType(String)), New DataColumn("dDate", GetType(Date)), New DataColumn("dCluster", GetType(Integer)), New DataColumn("dDRCODE", GetType(String)), New DataColumn("dAct_Name", GetType(String)), New DataColumn("dOrdNo", GetType(String)), New DataColumn("dOrdAmt", GetType(Float)), New DataColumn("dRemarks", GetType(String))}) 
For Each row As GridViewRow In gvDCR.Rows 
Try 
    Dim dUserid As String = row.Cells(0).Text 
    Dim dDate As Date = row.Cells(1).Text 
    Dim dCluster As Integer = Convert.toInt32(row.Cells(2).Text) 
    Dim dDrcode As String = row.Cells(3).Text 
    Dim dOrdNo As String = row.Cells(5).Text 
    Dim dOrdAmt As Float = System.Convert.ToFloat(row.Cells(6).Text) 
    Dim dRemarks As String = row.Cells(8).Text 

    dtu.Rows.Add(dUserid, dDate, dCluster, dDrcode, dOrdNo, dOrdAmt, dRemarks) 
    lblMsg.Text = "Data is ready to upload..!" 
    lblMsg.ForeColor = System.Drawing.Color.Green 
Catch ex As Exception 
    lblMsg.Text = "Exception occured during checking of data: " & ex.Message 
    lblMsg.ForeColor = System.Drawing.Color.Red 
End Try 
Next 
If dtu.Rows.Count > 0 Then 
    Using con As New SqlConnection(strConnection) 
    Using sqlBulkCopy As New SqlBulkCopy(con) 
     sqlBulkCopy.DestinationTableName = "dbo.dwr" 
     sqlBulkCopy.ColumnMappings.Add("dUserId", "dwr_for") 
     sqlBulkCopy.ColumnMappings.Add("dDate", "dwr_dt") 
     sqlBulkCopy.ColumnMappings.Add("dCluster", "block") 
     sqlBulkCopy.ColumnMappings.Add("dDrcode", "drcode") 
     sqlBulkCopy.ColumnMappings.Add("dOrdNo", "order_no") 
     sqlBulkCopy.ColumnMappings.Add("dOrdAmt", "ord_amt") 
     sqlBulkCopy.ColumnMappings.Add("dRemarks", "remarks") 
     con.Open() 
     Try 
     sqlBulkCopy.WriteToServer(dtu) 
     lblMsg.Text = "Data successfully updated into database." 
     lblMsg.ForeColor = System.Drawing.Color.Green 
     Catch ex As Exception 
     lblMsg.Text = "Exception occured during upload: " & ex.Message 
     lblMsg.ForeColor = System.Drawing.Color.Red 
     End Try 
     con.Close() 
    End Using 
    End Using 
End If 
End Sub