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我放在一個文本框代碼得到了集中event.what它的作用是當它到達一個焦點從表中找到一個值,並將其分配給textbox.But如果它沒有任何價值,它告訴用戶定義它,並將焦點放在另一個控件上,如果響應是肯定的,否則告訴用戶它不能繼續。最好的地方
什麼,我得到的是,如果沒有相應的價值和響應是肯定不能把注意力集中到可控制和只是循環的message.Any想法打破循環,如果響應是肯定的。
qry = "SELECT * FROM [fuel_allowance] WHERE [project number]='" & projcode & "' AND [employee number]='" & empcode & "'" & _
"AND [current month]=(SELECT [current month] FROM [fuel_allowance] WHERE [project number]='" & projcode & "' AND" & _
"[employee number]='" & empcode & "' AND MONTH([current month])=" & currentdate.Month & " AND YEAR([current month])=" & _
"" & currentdate.Year & ")"
If Button5.Tag = "New" Then
Dim dr As OleDb.OleDbDataReader = GetData(qry)
If dr.HasRows = True Then
Do While dr.Read
TextBox32.Text = dr.Item("total")
If Val(TextBox32.Text) > 800 Then
TextBox37.Text = Val(TextBox32.Text) - 800
Else
TextBox37.Text = 0
End If
TextBox38.Text = Val(TextBox36.Text) + Val(TextBox37.Text)
TextBox31.Text = (Val(TextBox33.Text) + Val(TextBox32.Text)) * Val(TextBox34.Text)
Loop
Else
If MsgBox("Fuel allowance not defined for the current month of " & MonthName(currentdate.Month, False) & vbCrLf & _
"Do you want to define it?", MsgBoxStyle.Question + MsgBoxStyle.YesNo, "Project Payroll") = MsgBoxResult.Yes Then
If TextBox32.Focused = True Then
TextBox27.Focus()
End If
Else
MsgBox("Cannot define allowance without defining fuel allowance", MsgBoxStyle.Critical, "Project Payroll")
Exit Sub
End If
End If
End If
這有可能是你指到錯誤的控制。請給你的文本框和按鈕有意義的名稱,而不是「TextBox32」等。然後通過你的代碼,看看你做的是否正確的邏輯,記住,當你.Focus()控件然後它的.GotFocus()處理程序幾乎立即被調用。 –