Question

问题：

我需要将DataGridView的内容转储到SQL Server数据库表中。我已经将datagridview加载正常，没有问题。我对VB.NET不太熟悉，无法理解如何将数据存入数据库表。

代码:(到目前为止）

    Dim connection As New Data.SqlClient.SqlConnection
    Dim dataAdapter As New Data.SqlClient.SqlDataAdapter
    Dim command As New Data.SqlClient.SqlCommand
    Dim dataSet As New Data.DataSet

    connection.ConnectionString = "Server= server; Database= DB; integrated security=true"
    command.CommandText = "INSERT INTO <table> (Col1, Col2, Col3, Col4) VALUES (@Name, @Property, @Value, @Date)"

    dataAdapter.InsertCommand.Parameters.Add("@ServerName", SqlDbType.VarChar)
    dataAdapter.InsertCommand.Parameters.Add("@Property", SqlDbType.VarChar)
    dataAdapter.InsertCommand.Parameters.Add("@Value", SqlDbType.VarChar)
    dataAdapter.InsertCommand.Parameters.Add("@CaptureDate", SqlDbType.DateTime)

    For i As Integer = 0 To DataGridView.Rows.Count - 1
        dataAdapter.InsertCommand.Parameters(0).Value = dgvServerConfig.Rows(i).Cells(0).Value
        dataAdapter.InsertCommand.Parameters(1).Value = dgvServerConfig.Rows(i).Cells(1).Value
        dataAdapter.InsertCommand.Parameters(2).Value = dgvServerConfig.Rows(i).Cells(2).Value
        dataAdapter.InsertCommand.Parameters(3).Value = dgvServerConfig.Rows(i).Cells(3).Value
    Next

    connection.Open()
    command.Connection = connection
    dataAdapter.SelectCommand = command

我在这里缺少什么？什么都没有插入我的桌子。任何帮助，将不胜感激。就像我说的那样，我对VB不太熟悉，所以请放轻松。

Answer 1

嗯，您需要执行命令，而不是简单地添加到DataAdapter中此外，正如现在编码的那样，您根本不需要DataAdapter。

Dim connection As New Data.SqlClient.SqlConnection
Dim command As New Data.SqlClient.SqlCommand

connection.ConnectionString = "Server= server; Database= DB; integrated security=true"
command.CommandText = "INSERT INTO <table> (Col1, Col2, Col3, Col4) VALUES (@Name, @Property, @Value, @Date)"

command.Parameters.Add("@ServerName", SqlDbType.VarChar)
command.Parameters.Add("@Property", SqlDbType.VarChar)
command.Parameters.Add("@Value", SqlDbType.VarChar)
command.Parameters.Add("@CaptureDate", SqlDbType.DateTime)
connection.Open()
command.Connection = connection

For i As Integer = 0 To DataGridView.Rows.Count - 1
    command.Parameters(0).Value = dgvServerConfig.Rows(i).Cells(0).Value
    command.Parameters(1).Value = dgvServerConfig.Rows(i).Cells(1).Value
    command.Parameters(2).Value = dgvServerConfig.Rows(i).Cells(2).Value
    command.Parameters(3).Value = dgvServerConfig.Rows(i).Cells(3).Value
    command.ExecuteNonQuery()
Next

但是，这会调用数据库一次插入一行。我认为最好只使用一次调用来查看解决插入/更新工作的SqlDataAdapter.Update方法。

使用SqlDataAdapter.Update方法，要求您在填充DataGridView时使用的适配器中保存一个全局变量，并添加一个为您生成InsertCommand，UpdateCommand和DeleteCommand的SqlCommandBuilder

    ' At form loading'
    Dim adapter As New OleDbDataAdapter()
    adapter.SelectCommand = New OleDbCommand("SELECT COL1, COL2,COL3,COL4 FROM TABLE", connection)
    Dim builder As OleDbCommandBuilder = New OleDbCommandBuilder(adapter)
    connection.Open()
    Dim myTable As DataTable = New DataTable
    adapter.Fill(myTable)
    DataGridView.DataSource = myTable
    ....

    ' at grid save'
    Dim myTable = CType(DataGridView.DataSource, DataTable)
    adapter.Update(myTable)

Answer 2

您可以致电：command.ExecuteNonQuery将数据插入数据库。

更多信息here

Answer 3

对于GridView中的每个对象，您需要找到它并确定其值。例如，

DropDownList ddlToLoc = (DropDownList)gvMovesMod.Rows[0].FindControl("ddlToLoc");

然后，确定ddlToLoc的SelectedValue并插入数据库

Answer 4

尝试此方法

 For index As Integer = 0 To DataGridView1.RowCount - 1

            Dim connectionString = "Data Source=localhost;port=3306;Initial Catalog=hasna;User Id=root;password=''; Convert Zero Datetime=True"
            Dim query0 = "insert into itemledgerfinal(Date,BillDate,BillNo,ItemName,GST,Rate,MRP,TotalQty,PurchaseRate,WholesaleRate,Total,Type,OpeningBalance,Purchase,Sale,ClosingBalance,ID) values(@Date,@BillDate,@BillNo,@ItemName,@GST,@Rate,@MRP,@TotalQty,@PurchaseRate,@WholesaleRate,@Total,@Type,@OpeningBalance,@Purchase,@Sale,@ClosingBalance,@ID)"


            Dim connection0 As New MySqlConnection(connectionString)
            Dim command0 As New MySqlCommand(query0, connection0)


            command0.Parameters.AddWithValue("@Date", DataGridView1.Rows(index).Cells(0).Value)
            command0.Parameters.AddWithValue("@BillDate", DataGridView1.Rows(index).Cells(1).Value) 
            command0.Parameters.AddWithValue("@BillNo", DataGridView1.Rows(index).Cells(2).Value)
            command0.Parameters.AddWithValue("@ItemName", DataGridView1.Rows(index).Cells(3).Value)
            command0.Parameters.AddWithValue("@GST", DataGridView1.Rows(index).Cells(4).Value)
            command0.Parameters.AddWithValue("@Rate", DataGridView1.Rows(index).Cells(5).Value)
            command0.Parameters.AddWithValue("@MRP", DataGridView1.Rows(index).Cells(6).Value)
            command0.Parameters.AddWithValue("@TotalQty", DataGridView1.Rows(index).Cells(7).Value)
            command0.Parameters.AddWithValue("@PurchaseRate", DataGridView1.Rows(index).Cells(8).Value)
            command0.Parameters.AddWithValue("@WholesaleRate", DataGridView1.Rows(index).Cells(9).Value)
            command0.Parameters.AddWithValue("@Total", DataGridView1.Rows(index).Cells(10).Value)
            command0.Parameters.AddWithValue("@Type", DataGridView1.Rows(index).Cells(11).Value)
            command0.Parameters.AddWithValue("@OpeningBalance", DataGridView1.Rows(index).Cells(12).Value)
            command0.Parameters.AddWithValue("@Purchase", DataGridView1.Rows(index).Cells(13).Value)
            command0.Parameters.AddWithValue("@Sale", DataGridView1.Rows(index).Cells(14).Value)
            command0.Parameters.AddWithValue("@ClosingBalance", DataGridView1.Rows(index).Cells(15).Value)
            command0.Parameters.AddWithValue("@ID", DataGridView1.Rows(index).Cells(16).Value)
            connection0.Open()
            command0.Connection = Connection
            command0.ExecuteNonQuery()

        Next

VB.NET将DataGridView内容插入数据库

4 个答案: