Question

这是我的代码，每次单击Button1，而不是刷新Datagridview时，它只会添加另一个与前一个条目重复的条目。我知道我在代码中遗漏了一些内容，它会在再次加载之前清除Datagrid中的数据。请帮忙..

Private Function LoadData_UnitProcess()

    Dim UP_SQL As String = "SELECT LotNum FROM Transactions WHERE StatusID=3 ORDER BY Process_EntryDate DESC"
    Dim UP_Ad As OleDbDataAdapter = New OleDbDataAdapter(UP_SQL, strCon)


    UP_Ad.Fill(UP_Ds, "Transactions")
    UnitOnProcess_DG.DataSource = UP_Ds.Tables(0)

    With UnitOnProcess_DG
        .RowHeadersVisible = False
        .Columns(0).HeaderCell.Value = "Lot #"
        .Columns(0).Width = "363"
        .AllowUserToAddRows = False
    End With


    LoadData_UnitProcess = ""
End Function

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    LoadData_UnitProcess()
End Sub

Private Sub Displayer_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    LoadData_UnitProcess()
End Sub

Answer 1

您的数据集UP_Ds可能是属性或字段。您需要在重新填充之前重置数据集，否则将内容附加到上一个数据集。

UP_Ds.Reset()
UP_Ad.Fill(UP_Ds, "Transactions")
UnitOnProcess_DG.DataSource = UP_Ds.Tables(0)

VB.Net - datagridview中的条目保持对事件的重复

1 个答案: