Working towards validating the username and password

EduNetworkBuilder/NB.cs

@@ -310,6 +310,8 @@ namespace EduNetworkBuilder
         public static int UntaggedVLAN = -1; //If the packet is not tagged.
         public static int MaxPacketsBeforeOptimizing = 50;
 
+        public static string AllowedPasswordCharacters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-=!~@#$%^&*()_+{}[]/?<>,.";
+        public static string AllowedUsernameCharacters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890._";
         /// <summary>
         /// Find the global random number generator.
         /// </summary>
@@ -896,6 +898,22 @@ namespace EduNetworkBuilder
             }
             return result;
         }
+        public static bool ValidateString(string tovalidate, string AllowedCharacters)
+        {
+            if (tovalidate == null || tovalidate == "") return false;
+            if (AllowedCharacters == null || AllowedCharacters == "") return false;
+            foreach (char one in tovalidate)
+                if (!AllowedCharacters.Contains(one)) return false;
+            return true;
+        }
+        public static bool ValidatePassword(string password)
+        {
+            return ValidateString(password, AllowedPasswordCharacters);
+        }
+        public static bool ValidateUsername(string password)
+        {
+            return ValidateString(password, AllowedUsernameCharacters);
+        }
 
     }
 }

EduNetworkBuilder/PersonProfileForm.Designer.cs

@@ -177,6 +177,7 @@
             this.btnImportStudents.TabIndex = 0;
             this.btnImportStudents.Text = "Import Students";
             this.btnImportStudents.UseVisualStyleBackColor = true;
+            this.btnImportStudents.Click += new System.EventHandler(this.btnImportStudents_Click);
             // 
             // TabHomework
             // 

EduNetworkBuilder/PersonProfileForm.cs

@@ -8,9 +8,20 @@ using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
 using System.IO;
+using Microsoft.VisualBasic.FileIO; //for CSV parsing
 
 namespace EduNetworkBuilder
 {
+    //A temporary holding structure when loading in students from CSV for validation.
+    //Once loaded and parsed, we then make actual students from them.
+     class StudentHolder
+    {
+        public string Name = "";
+        public string Password = "";
+        public string FullName = "";
+        public bool ForceToChangePass = true;
+    }
+
     public partial class PersonProfileForm : Form
     {
         enum TopTab { profiletab=0, classworktab=1}
@@ -378,5 +389,48 @@ namespace EduNetworkBuilder
                 Close(); //Exit out of the profile
             }
         }
+
+        private void btnImportStudents_Click(object sender, EventArgs e)
+        {
+            //Get a csv file
+            //try to read it in
+            //Import them all
+            OpenFileDialog mydialog = new OpenFileDialog();
+            mydialog.AddExtension = true;
+            string filter = "Comma Separated List (*.csv)|*.csv";
+            mydialog.Filter = filter;
+            mydialog.Multiselect = false;
+            mydialog.CheckFileExists = true;
+            mydialog.ShowHelp = true;
+            if (CurrentUser.UserSettings.LastPath != null && CurrentUser.UserSettings.LastPath != "")
+                mydialog.FileName = CurrentUser.UserSettings.LastPath;
+            DialogResult result = mydialog.ShowDialog();
+            if (result == System.Windows.Forms.DialogResult.Cancel) return;
+
+            List<StudentHolder> tList = new List<StudentHolder>();
+
+            //Now we have a csv file.  Try to parse it
+            using (TextFieldParser parser = new TextFieldParser(mydialog.FileName))
+            {
+                parser.TextFieldType = FieldType.Delimited;
+                parser.SetDelimiters(",");
+                while (!parser.EndOfData)
+                {
+                    //Process row
+                    int index = 0;
+                    string[] fields = parser.ReadFields();
+                    StudentHolder TStudent = new StudentHolder();
+                    foreach (string field in fields)
+                    {
+                        //TODO: Process field
+                        if (index == 0) TStudent.Name = field;
+                        if (index == 1) TStudent.FullName = field;
+                        if (index == 2) TStudent.Password = field;
+                        index++;  //Track which field we are in.
+                    }
+                    tList.Add(TStudent);
+                }
+            }
+        }
     }
 }