C# 如何使用C将窗体作为参数传递给函数#

我需要编写一个函数来防止自己一遍又一遍地编写相同的代码

下面是我想把它放到函数中的代码

    //make sure there are no other forms of the ame type open
    foreach (Form form in Application.OpenForms)
    {
        if (form.GetType() == typeof(DepartmentsAdd))
        {
            form.Activate();
            return;
        }
    }


    var newSignIn = new Verify();

    // Set the Parent Form of the Child window.
    newSignIn.MdiParent = this;
    newSignIn.FormClosed += delegate
    {

        if (UserInfo.Autherized == true)
        {
            UserInfo.Autherized = false;
            var role = new Roles();
            string[] aa = { "add" };

            if (role.hasAccess("department", aa))
            {
                var newMDIChild = new DepartmentsAdd();

                // Set the Parent Form of the Child window.
                newMDIChild.MdiParent = this;

                // Display the new form.
                newMDIChild.Show();
                newSignIn.Close();
            }
            else
            {
                Common.Alert("You do not have a permissions to perform this action!");
            }
        }
    };

    newSignIn.Show();

我必须将表单

DepartmentsAdd

设置为变量，以便将其分配给函数。另外，我必须将这个数组

string[]aa={“add”}

传递给这个函数，因为这是代码中更改的两个值

这是怎么做到的

到目前为止，我已经尝试过这个函数，但在使用

myform

    public static void OpenMyForm(string sectionName, string[] keys, Form myform)
    {
        //make sure there are no other forms of the ame type open
        foreach (Form form in Application.OpenForms)
        {
            if (form.GetType() == typeof(myform))
            {
                form.Activate();
                return;
            }
        }


        var newSignIn = new Verify();

        // Set the Parent Form of the Child window.
        newSignIn.MdiParent = this;
        newSignIn.FormClosed += delegate
        {

            if (UserInfo.Autherized == true)
            {
                UserInfo.Autherized = false;
                var role = new Roles();

                if (role.hasAccess(sectionName, keys))
                {
                    var newMDIChild = new myform();

                    // Set the Parent Form of the Child window.
                    newMDIChild.MdiParent = this;

                    // Display the new form.
                    newMDIChild.Show();
                    newSignIn.Close();
                }
                else
                {
                    Common.Alert("You do not have a permissions to perform this action!");
                }
            }
        };

        newSignIn.Show();
    }
}

下面是我得到的错误

The type or namespace name 'myform' could not be found (are you missing a using directive or an assembly reference?)

及

---

关键字“this”应该引用主父窗体（即

main.cs

）

如果使用静态方法，则必须这样做

• 这在静态方法中不起作用，myFrom也是表单本身，所以
• 无法以这种方式创建实例

   if(role.hasAccess(sectionName, keys))
      {
          var newMDIChild = myForm;
  
          // Set the Parent Form of the Child window.
          newMDIChild.MdiParent = <<your mdi form name>>; // instead of this. 
  
          // Display the new form.
          newMDIChild.Show();
          newSignIn.Close();
      }
  

  if（role.hasAccess（sectionName，keys））
  {
  var newMDIChild=myForm；
  //设置子窗口的父窗体。
  newMDIChild.mdipalent=；//而不是此。
  //显示新表单。
  newMDIChild.Show（）；
  newSignIn.Close（）；
  }
  

更换此线路：

if (form.GetType() == typeof(myform))

为此：

if (form.GetType() == myform.GetType())

---

我不认为我需要解释发生了什么，但如果这一变化的原因不清楚，请告诉我。

我终于想出了如何让它发挥作用

public void OpenMyForm(string sectionName, string[] keys, Form myform)
        {
            //make sure there are no other forms of the ame type open
            foreach (Form form in Application.OpenForms)
            {
                if (form.GetType() == myform.GetType())
                {
                    form.Activate();
                    return;
                }
            }

            var newSignIn = new Verify();
            newSignIn.MdiParent = this;
            newSignIn.FormClosed += delegate
            {

                if (UserInfo.Autherized == true)
                {
                    UserInfo.Autherized = false;
                    var role = new Roles();

                    if (role.hasAccess(sectionName, keys))
                    {
                        var newMDIChild = myform;

                        // Set the Parent Form of the Child window.
                        newMDIChild.MdiParent = this;

                        newMDIChild.Dock = DockStyle.Fill;
                        // Display the new form.
                        newMDIChild.Show();
                        newSignIn.Close();
                    }
                    else
                    {
                        Common.Alert("You do not have a permissions to perform this action!");
                    }
                }
            };

            newSignIn.Show();
        }

要调用此方法，我调用此行

OpenMyForm("department", new string[]  { "add" }, new DepartmentsAdd() );

---

谢谢，我纠正了这个问题，没有使这个方法成为静态的，也把它放在了我想使用的同一个类中。但问题不在于何时创建表单的新实例。（即，

var newMDIChild=new myform（）；

）这样更好。现在的问题是这一行var newMDIChild=new myform（）；

OpenMyForm("department", new string[]  { "add" }, new DepartmentsAdd() );