在Windows应用程序中有类似SESSION的东西吗?我希望存储一些值,以便在表单之间保持持久性.
例如:第一个表单有一些复选框,第三个表单相应地处理它们.所以我需要将复选的复选框存储在某处.
您只能通过放置复选框的此表单的属性公开您的复选框已选中状态,并从第三个或处理表单访问这些属性。
public partial class MainForm : Form {
// We assume we have let's say three CheckBoxes named chkFirst, chkSecond and chkThird
public bool IsFirstChecked { get { return chkFirst.Checked; } }
public bool IsSecondChecked { get { return chkSecond.Checked; } }
public bool IsThirdChecked { get { return chkThird.Checked; } }
// Calling this form from where these checked states will be processed...
// Let's suppose we have to click a button to launch the process, for instance...
private void btnLaunchProcess(object sender, EventArgs e) {
ProcessForm f = new ProcessForm();
f.Parent = this;
if (DialogResult.OK == f.ShowDialog()) {
// Process accordingly if desired, otherwise let it blank...
}
}
}
public partial class ProcessForm : Form {
// Accessing the checked state of CheckBoxes
private void Process() {
if ((this.Parent as MainForm).FirstChecked)
// Process according to first CheckBox.Checked state.
else if ((this.Parent as MainForm).SecondChecked)
// Process according to second CheckBox.Checked state.
else if ((this.Parent as MainForm).ThirdChecked)
// Process according to third CheckBox.Checked state.
}
}
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请考虑一下,我在脑海中选择了这段代码,因此它可能无法编译。无论如何,我希望这能让您了解如何在整个表单中传递您的价值观。
Web 和WinForm 编程之间最大的区别是Web 是无状态的。SESSION 和 VIEWSTATE 是允许保留值的解决方法。
WinForms 是有状态的,因此您不需要遍历 SESSION 和 VIEWSTATE 之类的变量。只要对象存在,值就会保留。