Create Folder

System.IO.Directory.CreateDirectory(@"c:\NewFolder");
System.IO.Directory.CreateDirectory(@"c:\NewFolder\NewSubFolder");


// Specify a "currently active folder"
//Create a new subfolder under the current active folder
string activeDir = @"c:\testdir2";

string newPath = System.IO.Path.Combine(activeDir, "mySubDir");

// Create the subfolder
System.IO.Directory.CreateDirectory(newPath);

Convert from string to byte

public static byte[] StringToByte(string InString)

{
System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();

Byte[] bytes = encoding.GetBytes(InString);

return bytes;
}

Color System.Drawing.Color Chart

System.Drawing.Color Chart

Array

The following code declares an array that can store 100 items starting from index 0 to 99.
int [] intArray;

intArray = new int[100];
int[,] numbers = new int[3, 2] { {1, 2}, {3, 4}, {5, 6} };

string[,] names = new string[2, 2] { {"A","B"}, {"X","Y"} };
int[] numArray = {1, 3, 5, 7, 9, 11, 13};

foreach (int num in numArray)

{

System.Console.WriteLine(num.ToString());

}

IsDate

    public bool IsDate(string sdate)
    {
        DateTime dt;
        bool isDate = true;
        try
        {
            dt = DateTime.Parse(sdate);
        }
        catch
        {
            isDate = false;
        }
        return isDate;
    }

Convert from Array to DataTable

Convert Array List to DataTable  
string[] AList = { "78", "73", "5", "3", "4" };  
DataTable dt = new DataTable();
for (int i = 0; i <= 4; i++)  
{
row = dt.NewRow();
row["xName"] = AList[i];
row["xID"] = AList[i];
dt.Rows.Add(row);
}
return dt;

DataSet to Array List

Converting DataSet to Arrary String in C#

public static string[] GetArrayListX()
{
string[] ArrayListX = new string[] { };

string sqlCommand = "Select a_desc as descrption, a_id as ID FROM table Order by a_desc";
Database db = DatabaseFactory.CreateDatabase(); //Using Microsoft Enterprise Library
DbCommand dbCommand = db.GetSqlStringCommand(sqlCommand);

DataSet ds = db.ExecuteDataSet(dbCommand);

DataTable DT = ds.Tables[0];

DataRowCollection Rows = DT.Rows;

int icount = ds.Tables[0].Rows.Count;
int i = 0;
if (icount > 0)
{
ArrayListX = new string[icount];
foreach (DataRow row in Rows)
{
ArrayListX[i] = row["descrption"].ToString();
i++;
}
}


return ArrayList;
}

Convert Double from String

    public static double getDoublefromString(string svalue)
    {
        double i = 0.00;
        try
        {
            i = Double.TryParse(svalue, out i) ? i : 0.00;
        }
        catch
        {
        }
        return i;
    }

Convert Int from String

     public static int getIntfromString(string svalue)
    {
        int i = -1;
        try
        {
            i = int.TryParse(svalue, out i) ? i : -1;
        }
        catch
        {
        }
        return i;
    }

Formating

18.333333 ---> 18.33
String.Format("{0:#0.00}", 18.333333);  //Please note that above 18.3333 is not a string value

s = String.Format("{0:c}", price)  //price is a double

Percentage

 lblX.Text = String.Format("{0:0%}", ABC); //ABC is a double

Inline ASPX page

lblX.Text='<%# Bind("sDate","{0:d}") %>'
lblY.Text='<%# Bind("XOAmount","{0:c}") %>'

Common Dates

DateTime tomorrow = DateTime.Today.AddDays(1);
DateTime amonthago = DateTime.Today.AddMonths(-1);
String lastmonthdate = amonthago.ToShortDateString();
String stodaydate = DateTime.Today.ToShortDateString();