[英]error in get data from access database to datagridview Vb.Net
i have a problem when i click to item in datagridview to get more information ! 我在datagridview中单击以获取更多信息时遇到问题! ok ?
好 ? my code :
我的代码:
Try
If (DataGridView1.Rows.Count = 0) Then Return
TextBox1.Text = String.Empty
TextBox2.Text = String.Empty
TextBox3.Text = String.Empty
TextBox4.Text = String.Empty
Dim id As String = DataGridView1(2, DataGridView1.SelectedRows(0).Index).Value
Dim dt As DataTable = New DBConnect().selectdata(String.Format("SELECT items.ClientName, items.ClientAddress, items.ClientPhone, items.ClientCredit, items.ClientLastPay FROM items where items.ClientID = {0}", id))
TextBox1.Text = dt.Rows(0)(0).ToString
TextBox2.Text = dt.Rows(0)(1).ToString
TextBox3.Text = dt.Rows(0)(2).ToString
TextBox4.Text = dt.Rows(0)(3).ToString
dt.Dispose()
dt = Nothing
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
by debugging the error is in this line : 通过调试错误在这一行:
Dim id As String = DataGridView1(2, DataGridView1.SelectedRows(0).Index).Value.ToString
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You are trying to access the DataGridView like an array, when you need to specify that you're looking in the rows and columns. 当您需要指定要在行和列中查找时,您试图像访问数组一样访问DataGridView。 Instead of
代替
DataGridView1(2, DataGridView1.SelectedRows(0).Index).Value
you can write 你可以写
DataGridView1.Columns(2).Cells(DataGridView1.SelectedRows(0).Index).Value
However, relying on SelectedRows is not the best way to do it. 但是,依靠SelectedRows并不是最好的方法。 What if the user accidentally selected a few rows and clicked the bottom one?
如果用户不小心选择了几行并单击了底部的行怎么办?
Assuming your code is in a CellClick handler with 假设您的代码在CellClick处理程序中,
(sender As Object, e As DataGridViewCellEventArgs)
you should use the DataGridViewCellEventArgs to tell what row you're on instead of relying on SelectedRows: 您应该使用DataGridViewCellEventArgs来告诉您所在的行,而不是依赖SelectedRows:
Dim id As String = DataGridView1(e.RowIndex).Cells(2).Value
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