public static System.Nullable <Guid> To_GUID_Null(object value)
{
System.Nullable <Guid> returnValue = null;
if (value != DBNull.Value)
{
try
{
if (value.GetType() == returnValue.GetType())
{
returnValue = (Guid)value;
}
else
{
returnValue = new Guid(DAL.To_String(value));
}
}
catch
{
returnValue = null;
}
}
return(returnValue);
}
public static void BindControlsToObject(object obj, Control container)
{
if (obj == null)
{
return;
}
//获取业务对象的属性
Type objType = obj.GetType();
PropertyInfo[] objPropertiesArray = objType.GetProperties();
foreach (PropertyInfo objProperty in objPropertiesArray)
{
Control control = FindControl(container, objProperty.Name);
if (control == null)
{
continue;
}
if (control is DateTimePicker)
{
DateTimePicker dateTimePicker = (DateTimePicker)control;
System.Nullable <DateTime> dt = (DateTime?)dateTimePicker.Value;
objProperty.SetValue(obj, Convert.ChangeType(dt, dt.GetType()),
null);
}
else if (control is NumericUpDown)
{
NumericUpDown numericUpDown = (NumericUpDown)control;
Nullable <decimal> i = (decimal?)numericUpDown.Value;
objProperty.SetValue(obj, Convert.ChangeType(i, i.GetType()), null);
}
else if (control is ComboBox)
{
ComboBox comboBox = (ComboBox)control;
objProperty.SetValue(obj, Convert.ChangeType(comboBox.Text, objProperty.PropertyType), null);
}
else
{
Type controlType = control.GetType();
PropertyInfo[] controlPropertiesArray = controlType.GetProperties();
bool success = false;
success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "Checked", typeof(bool));
if (!success)
{
success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "Value", typeof(String));
}
if (!success)
{
success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "Text", typeof(String));
}
if (!success)
{
success = FindAndGetControlProperty(obj, objProperty, control, controlPropertiesArray, "SelectedValue", typeof(String));
}
}
}
}
static void Main(string[] args)
{
//1
Console.WriteLine("\nTask 1\n");
//a
//типы переменных
bool var1 = true;
byte var2 = 2;
sbyte var3 = -7;
short var4 = 32700;
ushort var5 = 52432;
int var6 = -8900600;
uint var7 = 4000000000;
long var8 = -123123123123;
ulong var9 = 121212121212;
float var10 = 12.12F;
double var11 = 12.121212;
char var12 = 'h';
string var13 = "artemka";
object var14 = "hello, world";
decimal var15 = 10.6m;
//вывод
Console.WriteLine(var1);
Console.WriteLine(var2);
Console.WriteLine(var3);
Console.WriteLine(var4);
Console.WriteLine(var5);
Console.WriteLine(var6);
Console.WriteLine(var7);
Console.WriteLine(var8);
Console.WriteLine(var9);
Console.WriteLine(var10);
Console.WriteLine(var11);
Console.WriteLine(var12);
Console.WriteLine(var13);
Console.WriteLine(var14);
Console.WriteLine(var15);
//b
//неявное приведение
int a1 = 2147483647;
long a2 = a1;
sbyte b1 = -10;
short b2 = b1;
long c1 = 123123123;
float c2 = c1;
float d1 = 12.312f;
double d2 = d1;
byte e1 = 15;
uint e2 = e1;
//явное приведение
char aa1 = 'h';
int aa2 = (char)aa1;
short bb1 = 21;
int bb2 = (short)bb1;
sbyte cc1 = -3;
short cc2 = (sbyte)cc1;
uint dd1 = 12;
float dd2 = (uint)dd1;
float ee1 = 1.213f;
double ee2 = (float)ee1;
//c
//упаковка и распоковка
int box1 = 90;
object obj1 = box1;
int box2 = (int)obj1;
char box3 = '.';
object obj2 = box3;
char box4 = (char)obj2;
//d
//работа с неявно типизированными переменными
var text = "HELLO";
Console.WriteLine(text.GetType());
//e
//Nullable переменная
System.Nullable <double> null1 = null;
null1 = 1.1;
Console.WriteLine(null1.GetType());
//2
Console.WriteLine("\nTask 2\n");
//a
//Строковые литералы, сравнение строк
Console.WriteLine("comparison of string literals:");
int result = String.Compare("ac", "ca");
if (result < 0)
{
Console.WriteLine("first string is first (alphabetical)");
}
else if (result > 0)
{
Console.WriteLine("second string is first (alphabetical)");
}
else
{
Console.WriteLine("strings are equal (alphabetical)");
}
//b
string first = "me";
string second = "you";
string third = "Dima";
//сцепление 1
string str1 = first + ", " + second + " and " + third;
Console.WriteLine(str1);
//сцепление 2
string str2 = String.Concat(first, ", ", second, " and ", third, " inc. ");
Console.WriteLine(str2);
//копирование
string str3 = String.Copy(third);
Console.WriteLine(str3 + " Savelyev");
//выделение подстроки
Console.WriteLine(str1.Substring(4, 12));
//разделение строки на слова
string[] words = str1.Split(new char[] { ' ' });
foreach (string s in words)
{
Console.WriteLine(s);
}
//вставка подстроки в заданную позицию
string mod = str1.Insert(8, words[1] + " ");
Console.WriteLine(mod);
//c
//пустые и null-строки
string str4 = null;
string str5 = "";
Console.WriteLine(string.IsNullOrEmpty(str4));
Console.WriteLine(string.IsNullOrEmpty(str5));
//d
StringBuilder alphabet = new StringBuilder("abcdefg");
Console.WriteLine(alphabet);
alphabet.Remove(1, 2);
Console.WriteLine(alphabet);
alphabet.Insert(alphabet.Length, " - asdasf");
Console.WriteLine(alphabet);
//3
Console.WriteLine("\nTask 3\n");
//a
//матрица
Console.WriteLine("Matrix:");
int[,] Matrix = new int[4, 4];
Random Elem = new Random();
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 4; j++)
{
Matrix[i, j] = Elem.Next(1, 10);
Console.Write("{0} ", Matrix[i, j]);
}
Console.WriteLine();
}
//b
//одномерный массив строк
string[] Arr = { "arr1", "arr2", "arr3", "arr4" };
for (int i = 0; i < 4; i++)
{
Console.Write(Arr[i] + " ");
}
Console.WriteLine("array's length: {0}", Arr.Length);
Console.WriteLine("array element number: ");
int number;
number = int.Parse(Console.ReadLine());
Console.WriteLine("element value: ");
string value = Console.ReadLine();
Arr[number] = value;
Console.WriteLine("new array: ");
for (int i = 0; i < 4; i++)
{
Console.Write(Arr[i] + " ");
}
Console.WriteLine();
//c
//ступенчатый массив
int[][] stepArr = new int[4][];
stepArr[0] = new int[2];
stepArr[1] = new int[3];
stepArr[2] = new int[4];
Console.WriteLine("first arrays's string (2 elements): ");
for (int i = 0; i < 2; i++)
{
stepArr[0][i] = int.Parse(Console.ReadLine());
}
Console.WriteLine("second arrays's string (3 elements): ");
for (int i = 0; i < 3; i++)
{
stepArr[1][i] = int.Parse(Console.ReadLine());
}
Console.WriteLine("third arrays's string (4 elements): ");
for (int i = 0; i < 4; i++)
{
stepArr[2][i] = int.Parse(Console.ReadLine());
}
Console.WriteLine("stepped array: ");
for (int i = 0; i < 2; i++)
{
Console.Write(stepArr[0][i] + " ");
}
Console.WriteLine();
for (int i = 0; i < 3; i++)
{
Console.Write(stepArr[1][i] + " ");
}
Console.WriteLine();
for (int i = 0; i < 4; i++)
{
Console.Write(stepArr[2][i] + " ");
}
Console.WriteLine();
//d
//неявно типизированные переменные для строки и массива
var str6 = "hello again";
Console.WriteLine(str6);
var arr = new[] { 1, 2, 3 };
for (int i = 0; i < 3; i++)
{
Console.WriteLine(arr[i] + " ");
}
//4
Console.WriteLine("\nTask 4\n");
//a
//создание кортежа
(int, string, char, string, ulong)tuple = (2048, "oh hi Mark", 'd', "I DID NOT", 100001000010000);
//вывод кортежа
Console.WriteLine(tuple); //целиком
Console.WriteLine(tuple.Item1);
Console.WriteLine(tuple.Item3);
Console.WriteLine(tuple.Item4);
//распаковка кортежа в переменные
int t1 = tuple.Item1;
string t2 = tuple.Item2;
char t3 = tuple.Item3;
string t4 = tuple.Item4;
ulong t5 = tuple.Item5;
//сравнение кортежей
(int, string, char, string, ulong)tuple1 = (2048, "oh hi Mark", 'd', "I DID NOT", 100001000010000);
if (tuple == tuple1)
{
Console.WriteLine("tuples are equal");
}
else
{
Console.WriteLine("tuples are NOT equal");
}
//5
Console.WriteLine("\nTask 5\n");
//локальная функция
int[] arrF = { 40, 45, 12, 8, 32 };
Console.WriteLine("integer array:");
for (int i = 0; i < 5; i++)
{
Console.Write(arrF[i] + " ");
}
Console.WriteLine();
string strF = "Potapov";
Console.Write("string:");
Console.WriteLine(strF);
var tupleF = localFunc(arrF, strF);
Console.Write("function result: ");
Console.WriteLine(tupleF);
(int, int, int, string) localFunc(int[] arrFunc, string strFunc)
{
(int Max, int Min, int Sum, string First)resultF = (arrFunc[0], arrFunc[0], 0, " ");
resultF.First = strFunc.Remove(1); //вырезаем 1 букву из строки
for (int i = 0; i < arrFunc.Length; i++)
{
resultF.Sum += arrFunc[i];
}
for (int i = 0; i < arrFunc.Length; i++)
{
if (resultF.Max < arrFunc[i])
{
resultF.Max = arrFunc[i];
}
}
for (int i = 0; i < arrFunc.Length; i++)
{
if (resultF.Min > arrFunc[i])
{
resultF.Min = arrFunc[i];
}
}
return(resultF);
}
}