[英]Vb.net Editing DatagridView
我创建了一个简单的程序,可以在其中搜索数据库表。 通过按钮添加数据和删除数据。 现在,我希望能够更新datagrid视图中的数据,但是我遇到了经典的错误:不支持不返回任何键列信息的SelectCommand,不支持UpdateCommand的动态SQL生成。
我的主键位于数据网格中,该主键目前未附加到vb.net程序或数据库中的任何内容。 我不确定我缺少什么。
Public Class Form1
Dim cn As New SqlConnection("Data Source=;Initial Catalog=Inventory;User ID=;Password=")
Dim adap As New SqlDataAdapter("SELECT res_snbr, First_Name, Last_Name, Item FROM Inventory_Details", cn)
Dim builder As New SqlCommandBuilder(adap)
Dim dt As New DataTable
'Dim InventoryDetailsBindingSource As New BindingSource
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load
DataGridView1.AllowUserToAddRows = True
DataGridView1.AllowUserToDeleteRows = True
DataGridView1.[ReadOnly] = False
adap.InsertCommand = builder.GetInsertCommand()
' adap.UpdateCommand = builder.GetUpdateCommand()
adap.UpdateCommand = builder.GetUpdateCommand
adap.Fill(dt)
InventoryDetailsBindingSource.DataSource = dt
DataGridView1.DataSource = InventoryDetailsBindingSource
End Sub
Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) Handles TextBox1.TextChanged
If TextBox1.TextLength > 0 Then
InventoryDetailsBindingSource.Filter = String.Format("First_Name Like '%{0}%'", TextBox1.Text)
Else
InventoryDetailsBindingSource.Filter = String.Empty
End If
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Try
adap.Update(dt)
MessageBox.Show("Saved successfully")
Catch ex As Exception
MessageBox.Show("Error updating database")
End Try
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
adap.Update(dt)
DataGridView1.[ReadOnly] = True
Button2.Enabled = False
End Sub
End Class
其实我是不对的。 我的数据库上没有设置主键。 我放下了表格-用主键重新创建。
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