working

Form1.cs

@@ -20,7 +20,10 @@ namespace it_projekt
 
         private void exportBtn_Click(object sender, EventArgs e)
         {
-            exportJSON();
+            if (jsonRBtn.Checked)
+                exportJSON();
+            else
+                exportXML();
         }
 
         private void loginBtn_Click(object sender, EventArgs e)
@@ -82,6 +85,41 @@ namespace it_projekt
             }
         }
 
+        private void exportXML()
+        {
+            Stream myStream;
+            SaveFileDialog saveFileDialog1 = new SaveFileDialog();
+
+            saveFileDialog1.Filter = "All files (*.*)|*.*|xml files (*.xml)|*.xml";
+            saveFileDialog1.FilterIndex = 2;
+            saveFileDialog1.RestoreDirectory = true;
+            saveFileDialog1.FileName = "benutzer.xml";
+
+            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
+            {
+                if ((myStream = saveFileDialog1.OpenFile()) != null)
+                {
+                    List<Person> markedUsers = new List<Person>();
+                    foreach (DataGridViewRow row in dataGrid.Rows)
+                    {
+                        if (row.Cells[4].Value != null)
+                        {
+                            if (row.Cells[4].Value.ToString() == "True")
+                            {
+                                markedUsers.Add(db.Persons.Find(person => person.Id == row.Cells[0].Value.ToString()));
+                            }
+                        }
+                    }
+                    StreamWriter sw = new StreamWriter(myStream);
+                    var writer = new System.Xml.Serialization.XmlSerializer(typeof(List<Person>));
+                    writer.Serialize(sw, markedUsers);
+                    sw.Flush();
+                    sw.Close();
+                    myStream.Close();
+                }
+            }
+        }
+
         private void Form1_Load(object sender, EventArgs e)
         {
 
@@ -89,16 +127,12 @@ namespace it_projekt
 
         private void jsonRBtn_CheckedChanged(object sender, EventArgs e)
         {
-            xmlRBtn.Checked = false;
-            if (!jsonRBtn.Checked)
-                jsonRBtn.Checked = true;
+
         }
 
         private void xmlRBtn_CheckedChanged(object sender, EventArgs e)
         {
-            xmlRBtn.Checked = false;
-            if (!xmlRBtn.Checked)
-                xmlRBtn.Checked = true;
+            
         }
     }
 }