如何从vb net导入excel数据到sql数据库

Question

我有这样的情况，当从vbnet将数据excel导入到sql数据库时，如果数据中的事件新id，则必须添加数据。有人有代码吗？所以我希望你能在这里分享。谢谢你

Answer 1

当然，我可以为您提供如何在 VB.NET 中完成此任务的基本概述。但是，请注意，具体实施可能会根据您的具体要求、Excel 文件的结构以及 SQL 数据库配置而有所不同。

以下是有关如何使用 VB.NET 将数据从 Excel 文件导入 SQL 数据库的一般指南。在此示例中，我假设您使用的是 SQL Server。

1. 设置数据库连接：

Imports System.Data.SqlClient

Public Class Form1
    Private connectionString As String = "Your_SQL_Connection_String"
    Private connection As SqlConnection

    Public Sub New()
        InitializeComponent()
        connection = New SqlConnection(connectionString)
    End Sub
End Class

2. 导入数据的代码：

Private Sub ImportDataButton_Click(sender As Object, e As EventArgs) Handles ImportDataButton.Click
    Try
        Dim excelConnectionString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=Your_Excel_File_Path;Extended Properties='Excel 12.0 Xml;HDR=YES;'"
        Dim excelConnection As New OleDbConnection(excelConnectionString)

        excelConnection.Open()

        Dim sheetName As String = "Sheet1$" ' Change this to your sheet name

        Dim query As String = "SELECT * FROM [" & sheetName & "]"
        Dim excelAdapter As New OleDbDataAdapter(query, excelConnection)
        Dim excelDataSet As New DataSet()
        excelAdapter.Fill(excelDataSet, "ExcelData")

        excelConnection.Close()

        Dim dataTable As DataTable = excelDataSet.Tables("ExcelData")

        connection.Open()

        For Each row As DataRow In dataTable.Rows
            Dim id As Integer = Integer.Parse(row("ID").ToString()) ' Change "ID" to your column name
            Dim data As String = row("Data").ToString() ' Change "Data" to your column name

            ' Check if the ID already exists in the database
            Dim checkQuery As String = "SELECT COUNT(*) FROM YourTable WHERE ID = @ID"
            Dim checkCommand As New SqlCommand(checkQuery, connection)
            checkCommand.Parameters.AddWithValue("@ID", id)

            Dim existingCount As Integer = Convert.ToInt32(checkCommand.ExecuteScalar())

            If existingCount = 0 Then
                ' ID doesn't exist, insert the data
                Dim insertQuery As String = "INSERT INTO YourTable (ID, Data) VALUES (@ID, @Data)"
                Dim insertCommand As New SqlCommand(insertQuery, connection)
                insertCommand.Parameters.AddWithValue("@ID", id)
                insertCommand.Parameters.AddWithValue("@Data", data)
                insertCommand.ExecuteNonQuery()
            End If
        Next

        connection.Close()
        MessageBox.Show("Data imported successfully.")
    Catch ex As Exception
        MessageBox.Show("Error: " & ex.Message)
    End Try
End Sub

3. 按钮和UI设置：

将

Button

控件拖放到表单上，将其文本设置为“导入数据”之类的内容，然后双击它以创建单击事件处理程序。然后，将上面的

ImportDataButton_Click

代码粘贴到事件处理程序中。

请记住替换

Your_SQL_Connection_String

、

Your_Excel_File_Path

、

Sheet1$

、

YourTable

、

"ID"

、

"Data"

等占位符，并根据实际的 Excel 文件和数据库设置调整列名称。

请确保在生产场景中正确处理异常、关闭连接、合理处置资源。

此示例演示了基本实现。根据您的具体要求，您可能需要在导入过程中添加更多错误处理、验证和自定义。