AppActivate Visual Basic

VB.NET > Functions > AppActivate

Activates an application that is already running.

Example:
Start and activate notepad

AppActivate(Shell("C:\Windows\System32\notepad.exe", AppWinStyle.NormalFocus))

CurDir Visual Basic

VB.NET > Functions > CurDir 

Returns the current path.

Example:

MessageBox.Show(CurDir())

C# Random Color

C# > Color > Random

Random rnd = new Random();

Color randomColor = Color.FromArgb(rnd.Next(255), rnd.Next(255), rnd.Next(255));

Change DataGridView column to Hyperlink Runtime

C# > DataGridView > DataGridViewLinkCell

Example: Change DataGridView column to Hyperlink Runtime

foreach (DataGridViewRow r in dgv.Rows)

{

DataGridViewLinkCell lc = new DataGridViewLinkCell();

       lc.Value = r.Cells[1].Value;

       dgv[1, r.Index] = lc;

}

private void dgv_CellContentClick(object sender, DataGridViewCellEventArgs e)

{

if (e.RowIndex == -1)

              return;

if (dgv.Rows[e.RowIndex].Cells[e.ColumnIndex] is DataGridViewLinkCell)

       {

             string link = "http://www...";

             if(e.ColumnIndex == 1)

                System.Diagnostics.Process.Start(link  +                          dgv.Rows[e.RowIndex].Cells[4].Value as string);

       }

}

Read save data to Registry C# Example

C# > Win32 > RegistryKey 

RegistryKey represents a key-level node in the Windows registry

Example:

Save user name to registry

RegistryKey regKey = Microsoft.Win32.Registry.CurrentUser.OpenSubKey("MyProgram");

if (regKey == null)

  regKey = Microsoft.Win32.Registry.CurrentUser.CreateSubKey("MyProgram");

if (regKey.GetValue("User", "") == null)

{

  regKey.SetValue("User", txtUser.Text);

}

else

{

  if (txtUser.Text != regKey.GetValue("User", "").ToString())

  {

    regKey.SetValue("User", txtUser.Text);

  }

}

regKey.Close();

Multiple Filter DataGridView DataSource

C# > DataGridView > Multiple Filter

RowFilter gets or sets the expression used to filter.

Example:

Filter by code or description

string rowFilter = string.Format("[{0}] like '%{1}%'", "Code", txtSearch.Text);

rowFilter += string.Format(" OR [{0}] like '%{1}%'", "Description", txtSearch.Text);

(DataGridView1.DataSource as DataTable).DefaultView.RowFilter = rowFilter;

Handle click event in Button Column in DataGridView

C# > DataGridView > DataGridViewButtonColumn

Add DataGridViewButtonColumn to your DataGridView.

To handle button click use CellClickEvent.

Example

private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)

{

  if (e.ColumnIndex == dataGridView1.Columns["Browse"].Index && e.RowIndex >= 0)

  {

               

  }

}