请教老师，看看下面代码有什么问题
代码在DataColChanged事件中
Dim biaoming As String = e.DataRow("表名称")
Dim lieming As String = e.DataRow("字段名称")
Dim cmd As new SQLCommand
cmd.ConnectionName = gs_strActiveConn
cmd.CommandText="se lect _Identify," & lieming & " from " & biaoming
Dim dt As DataTable = cmd.ExecuteReader(True)
If dt.DataRows.Count > 0 Then
Forms("提示窗口").Visible = True
Dim p As WinForm.ProgressBar = Forms("提示窗口").Controls("Bar1")
p.Visible = True
p.Maximum =dt.DataRows.Count '设置最大值
p.Minimum = 0 '设置最小值
p.Value = 0 '设置当前值
Dim j As Integer =0
Dim str As String = ""
_KQSJ = False
For Each dr As DataRow In dt.DataRows
If e.OldValue = "" Then
str = e.NewValue & dr(lieming)
Else
str = dr(lieming).Replace(e.OldValue,e.NewValue)
End If
dr(lieming) = str
j=j+1
p.Value = j
Next
_KQSJ = True
dt.Save()
p.Visible = False
Forms("提示窗口").Visible = False
End If
If DataTables.Contains(e.DataRow("表名称")) = True Then
DataTables(e.DataRow("表名称")).Load
End If
dt有5000条记录，不执行红色部分代码时，运行很快结束，包括红色部分代码时，进度条只显示一点就停了，整个运行过程要十多分钟才结束，请老师看看有什么问题？
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Post By：2017/6/8 13:32:00 [只看该作者]
