Question

我正在尝试将值从网格行存储到数据列，然后使用sqlBulkCopy将数据插入到我的数据库中。

我的gridview设计按以下方式设置：

    <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>

我的gridview Row按以下方式存储数据：

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

这就是我尝试将数据从gridview行到数据列和数据列到数据库的数据：

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

表的数据类型如下：

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]

现在它显示错误为“上传期间发生异常：数据源中String类型的给定值无法转换为指定目标列的int类型”

有关导致此错误的原因的任何想法？

Answer 1

使用以下代码。可能对它有所帮助。我已将dCluster列字符串的数据类型更改为整数。

document.getElementById("Inner_Upper_Div").style.height = <calculated height based on parent div's height> ;

sqlBulkCopy：无法将数据源中String类型的给定值转换为指定目标列

1 个答案: