//Updates an entry in a given table
public static void Update(object obj, string tableName, Type objType)
{
DbAccess dbConn = new DbAccess();
bool confirmed = false;
while (!confirmed)
{
Console.Write("Please insert a unique identifier for the change: ");
string searchTxt = Console.ReadLine();
try
{
//Gets a list of any entries where a field matches the searchTxt
List<dynamic> entries = dbConn.GetList(obj, tableName, searchTxt);
if (entries.Count() < 1) //No entries found
{
Console.WriteLine("No entries matched the filter...");
}
else if (entries.Count() > 1) //no single match
{
Console.Clear();
Display.WriteTable(entries);
Console.WriteLine($"Your query returned {entries.Count()} entries...");
}
else //All good - a single match
{
confirmed = true;
Console.Clear();
Display.WriteTable(entries);
PropertyInfo[] props = obj.GetType().GetProperties();
List<string> propNames = new List<string>();
foreach (PropertyInfo prop in props)
{
if (prop.Name != "id")
{
propNames.Add(prop.Name);
}
}
propNames.Add("Exit");
//Gets the desired property to be changed - Will loop until the user exists
string propToChange = "";
while (true)
{
Console.WriteLine("Which property would you like to change? (press 'exit' to exit the loop): ");
propToChange = Functionality.Select(propNames.ToArray());
//Breaks out of the loop if the user types 'exit'
if (propToChange == "Exit")
break;
if (Array.Find(props, x => x.Name == propToChange) != null) //Property exists and is not 'id' - all good
{
//Gets the new value for the object property
Console.Write($"Insert the new value for {propToChange}: ");
string newVal = Console.ReadLine();
var d = (IDictionary<string, object>)entries.FirstOrDefault();
foreach (var key in d.Keys)
{
obj.GetType().GetProperty(key).SetValue(obj, d[key]);
}
obj.GetType().GetProperty(propToChange).SetValue(obj, newVal);
//Attempts to update the object in the Db
if (!dbConn.ChangeObj(obj, tableName)) //Update failed
{
Console.Clear();
Console.WriteLine("Something went wrong. Make sure the foreign keys being updated do exist in the other tables...");
}
else //Update succeded
{
Console.Clear();
Console.WriteLine($"'{propToChange}' successfully updated to '{newVal}'!");
Console.ReadKey();
}
}
else //Property not found
{
Console.Clear();
Console.WriteLine("The property entered doesn't exist or was misspelled");
}
}
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
confirmed = true;
}
}
}
//Deletes an entry in a given table
public static void Delete(object obj, string tableName)
{
DbAccess dbConn = new DbAccess();
bool confirmed = false;
while (!confirmed)
{
Console.Write("Please insert a unique identifier for the deletion: ");
string searchTxt = Console.ReadLine();
try
{
//Gets a list of any entries where a field matches the searchTxt
List<dynamic> entries = dbConn.GetList(obj, tableName, searchTxt);
if (entries.Count() < 1) //No entries found
{
Console.Clear();
Console.WriteLine("No entries matched the filter...");
}
else if (entries.Count() > 1) //More than 1 match - Not unique
{
Console.Clear();
Display.WriteTable(entries);
Console.WriteLine($"Your query returned {entries.Count()} entries...");
}
else //All good - a single match
{
confirmed = true;
Console.Clear();
Display.WriteTable(entries); //Shows the item about to be deleted
string deleteAns = "";
while (deleteAns != "yes" && deleteAns != "no") //Gets a confirmation from the user
{
Console.WriteLine("Are you sure you want to delete this entry?: ");
deleteAns = Functionality.Select(new string[] { "NO", "YES" }).ToLower();
}
if (deleteAns == "yes") //Proceed with deletion
{
//Sets the new object's id to be the one from the selected entry for deletion
var d = (IDictionary<string, object>)entries.FirstOrDefault();
obj.GetType().GetProperty("id").SetValue(obj, d["id"]);
//Tries to delete the item from the given table
if (dbConn.DeleteObj(obj, tableName)) //Success
{
Console.WriteLine("Deletion successfull! Press any key to return to start menu...");
}
else //Failure
{
Console.WriteLine("Something went wrong when trying to delete this item.");
}
Console.Clear();
}
else //Deletion cancelled
{
Console.Clear();
Console.WriteLine("Deletion cancelled, press any key to go back to the start...");
}
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Console.ReadKey();
}
}
}