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回答したコードで動作しなかったため更新

2020/05/11 07:20

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answer CHANGED Viewed

@@ -17,11 +17,11 @@
         public UserControl1 u1;
         public Form1 f1;
-        public Form2(UserControl1 u, Form1 f)
+        public Form2(UserControl1 u, Form1 myParent)
         {
             InitializeComponent();
             u1 = u;
-            f1 = f;
+            f1 = myParent;
         }
         private void Button1_Click(object sender, EventArgs e)
@@ -47,8 +47,8 @@
             if (Isopen == false)
             {
-                Form1 form1 = new Form1();
+                Form1 myParent = (Form1)this.ParentForm;
-                Form2 form2 = new Form2(this, form1);
+                Form2 form2 = new Form2(this, myParent);
                 form2.Show();
             }
         }