Question

VB中怎样设置将文本框中的数据保存下来？

也就是第一次打开程序后在一个文本框里输入一些字符，关闭程序再次打开后那个文本框里仍然显示上一次输入的内容。

Answer 1

这个方法可以利用API函数读写配置文件实现，参考例子如下：首先申明API：Private Declare Function WritePrivateProfileString Lib "kernel32" Alias "WritePrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As Any, ByVal lpString As Any, ByVal lpFileName As String) As Long
Private Declare Function GetPrivateProfileString Lib "kernel32" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As Any, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Long, ByVal lpFileName As String) As Long 将Text1的内容保存到E:\a.ini中：
Private Sub Command1_Click()
WritePrivateProfileString "UserName", "User", Text1.Text, "E:\a.ini"
End Sub 将E:\a.ini的内容读取到text2中Private Sub Command2_Click()
Dim inistring As String
inistring = Space$(254)
GetPrivateProfileString "Username", "User", "", inistring, 255, "E:\a.ini"
Text2.Text = CStr(inistring)
End Sub

Answer 2

程序关闭,变量生成周期就到了,一般只能写入文件(比如txt,xml)或者写入数据库保存

Answer 3

字量少的话，写入注册表，getsettings,savesettings

Answer 4

可以 读取本地文件获取内容