C#: .Net WinForms

Keeps the WinControl in the center of the Form
public class AlwaysCentered : System.Windows.Forms.Form { private System.Windows.Forms.Button button1; private System.ComponentModel.Container components = null; public Form1() { InitializeComponent(); Centralize(); } private void Form1_SizeChanged(object sender, System.EventArgs e) { Centralize(); } private void Centralize() { int x,y; x = this.Width/2 - this.button1.Width/2; y = this.Height/2 - this.button1.Height/2; this.button1.Location = new Point(x,24); } }

BasicMdiForm Model
public class BasicMdiForm : Form { private MainMenu mainMenu1; private Container components = null; private MenuItem miFile; private MenuItem miNewFile; private MenuItem miExit; public BasicMdiForm() { InitializeComponent(); OpenFullScreenButNotMaximized(); CreateMenu(); } private void OpenFullScreenButNotMaximized() { Screen screen = Screen.PrimaryScreen; int w = screen.WorkingArea.Width; int h = screen.WorkingArea.Height - SystemInformation.MenuHeight; Rectangle rect = new Rectangle(0,0,w,h); StartPosition = FormStartPosition.Manual; this.DesktopBounds = rect; } protected void CreateMenu() { // MenuItem miFile = mainMenu1.MenuItems.Add("&File"); miFile.MergeOrder = 0; miFile.MergeType = MenuMerge.MergeItems; // SubMenuItem > New File miNewFile = new MenuItem("&New File", new EventHandler(this.NewFile_Clicked), Shortcut.CtrlN); miNewFile.MergeOrder = 01; // SubMenu Item > Exit miExit = new MenuItem("E&xit", new EventHandler(this.FileExit_Clicked), Shortcut.CtrlX); miExit.MergeOrder = 02; miFile.MenuItems.Add(miNewFile); miFile.MenuItems.Add("-"); miFile.MenuItems.Add(miExit); } protected void NewFile_Clicked(object sender, System.EventArgs e) { Form2 f2 = new Form2(); f2.MdiParent = this; this.ActiveMdiChild.WindowState = FormWindowState.Maximized; // Hide Menu Item //mainMenu1.MenuItems.Remove(miFile); //form.Show(); } protected void FileExit_Clicked(object sender, System.EventArgs e) { this.Close(); } }

Open the Browse for File DialogBox
private void BrowseForFile() { OpenFileDialog ofd = new OpenFileDialog(); //openFileDialog1.InitialDirectory = @"C:\"; ofd.Filter = "Jpg Files (.jpg)|.jpg"; if( ofd.ShowDialog() == DialogResult.OK ) { // Extract the LocalPath | Need It for Ftp // int ix = ofd.FileName.LastIndexOf(@"\"); TextBox1.Text = ofd.FileName.Substring(0,ix) + @"\*.jpg"; string fileName = ofd.FileName.Substring( ix+1 ); // } }

Open the Browse for Folder DialogBox
using System.Windows.Forms.Design; // http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=275&lngWId=10 // Add a reference to System.Design.DLL public class BrowseForFolder : System.Windows.Forms.Form { internal System.Windows.Forms.Button btnJpg; internal System.Windows.Forms.TextBox txtWildcard; private System.ComponentModel.Container components = null; private void btnJpg_Click(object sender, System.EventArgs e) { BrowseFolder bf = new BrowseFolder(); txtWildcard.Text = bf.BrowseDialog("Indique a Pasta com os Jpgs"); } } public class BrowseFolder : FolderNameEditor { FolderNameEditor.FolderBrowser bDialog; public BrowseFolder() { bDialog = new FolderNameEditor.FolderBrowser(); } public string BrowseDialog(string title) { bDialog.Description = title; bDialog.StartLocation = FolderNameEditor.FolderBrowserFolder.MyComputer; bDialog.Style = FolderNameEditor.FolderBrowserStyles.RestrictToDomain; bDialog.ShowDialog(); return bDialog.DirectoryPath;; } ~BrowseFolder() { bDialog.Dispose(); } }

Fill the ComboBox from A to Z and catch the selection event
public class ComboBoxAlphabet : System.Windows.Forms.Form { private System.Windows.Forms.ComboBox cbxAlphabet; private System.ComponentModel.Container components = null; public Form1() { InitializeComponent(); LoadCbxAlphabet(); } private void LoadCbxAlphabet() { for( char i='A'; i<='Z'; i++ ) { this.cbxAlphabet.Items.Add( i ); } } private void cbxAlphabet_SelectedIndexChanged(object sender, System.EventArgs e) { MessageBox.Show( this.cbxAlphabet.SelectedItem.ToString() ); } }

Compact and Repair an Access Database. Add Ref. to : AdoDb, Jro
< ?xml version="1.0" encoding="utf-8" ?> <configuration> <appSettings> <add key="CnnStrOriginal" value="PROVIDER=Microsoft.Jet.OLEDB.4.0; DATA Source=C:\Inetpub\wwwroot\CompactAndRepairAccessDb\Original.mdb" /> <add key="CnnStrCompacted" value="PROVIDER=Microsoft.Jet.OLEDB.4.0; DATA Source=C:\Inetpub\wwwroot\CompactAndRepairAccessDb\Compacted.mdb" /> <add key="PathOriginal" value="C:\Inetpub\wwwroot\CompactAndRepairAccessDb\Original.mdb" /> <add key="PathCompacted" value="C:\Inetpub\wwwroot\CompactAndRepairAccessDb\Compacted.mdb" /> </appSettings> </configuration> using ADODB; using JRO; using System.Configuration; using System.Data.OleDb; using System.IO; public class CompactAndRepairAccessDb : System.Windows.Forms.Form { private System.ComponentModel.Container components = null; private JRO.JetEngine jro; private System.Windows.Forms.Button btnConfirm; private System.Windows.Forms.TextBox tbxOriginalDbSize; private System.Windows.Forms.TextBox tbxCompactedDbSize; private OleDbConnection cnn; public CompactAndRepairAccessDb() { InitializeComponent(); FileInfo fi = new FileInfo( ConfigurationSettings.AppSettings["PathOriginal"] ); int s = Convert.ToInt32( fi.Length/1000 ); this.tbxOriginalDbSize.Text = s.ToString() + " kb"; } private void btnConfirm_Click(object sender, System.EventArgs e) { // First close all instances of the database // MUST HAVE EXCLUSIVE use of the DB by the app // cnn = new OleDbConnection( ConfigurationSettings.AppSettings["CnnStrOriginal"] ); cnn.Open(); cnn.Close(); // Compact DB // if( cnn.State.ToString() == "Closed" ) { jro = new JRO.JetEngine(); jro.CompactDatabase( ConfigurationSettings.AppSettings["CnnStrOriginal"],ConfigurationSettings.AppSettings["CnnStrCompacted"] ); FileInfo fi = new FileInfo( ConfigurationSettings.AppSettings["PathCompacted"] ); int s = Convert.ToInt32( fi.Length/1000 ); this.tbxCompactedDbSize.Text = s.ToString() + " kb"; // Delete OldDb | Rename the Compacted DB // File.Delete( ConfigurationSettings.AppSettings["PathOriginal"] ); File.Copy( ConfigurationSettings.AppSettings["PathCompacted"], ConfigurationSettings.AppSettings["PathOriginal"] ); File.Delete( ConfigurationSettings.AppSettings["PathCompacted"] ); } } }

Apply a StyleSheet to a WinForm Datagrid and catch some events
using System.Data.OleDb; public class DataGrid_Style : System.Windows.Forms.Form { private System.Windows.Forms.GroupBox gbxMain; private System.Windows.Forms.TextBox tbxEmpresa; private System.Windows.Forms.TextBox tbxWebSite; private System.Windows.Forms.DataGrid dg1; private System.ComponentModel.Container components = null; public Form1() { InitializeComponent(); ApplyDataGridStyle(); LoadData(); } private void ApplyDataGridStyle() { DataGridTableStyle dgTs = new DataGridTableStyle(); dgTs.MappingName = "Data"; dgTs.AlternatingBackColor = System.Drawing.Color.Lavender; dgTs.HeaderBackColor = System.Drawing.Color.Lavender; //dgTs.RowHeadersVisible = false; DataGridTextBoxColumn dgTbc1 = new DataGridTextBoxColumn(); dgTbc1.MappingName = "CompanyID"; dgTbc1.HeaderText = "Empresa"; dgTbc1.Width = 100; DataGridTextBoxColumn dgTbc2 = new DataGridTextBoxColumn(); dgTbc2.MappingName = "Url"; dgTbc2.HeaderText = "WebSite"; dgTbc2.Width = 316; dgTs.GridColumnStyles.Add( dgTbc1 ); dgTs.GridColumnStyles.Add( dgTbc2 ); this.dg1.TableStyles.Add( dgTs ); } private void LoadData() { string s = @"PROVIDER=Microsoft.Jet.OLEDB.4.0; DATA Source=C:\Documents and Settings\Administrator\My Documents\Visual Studio Projects\WindowsForms\Sample.mdb;"; OleDbConnection cnn = new OleDbConnection( s ); string sql = string.Format( "SELECT * FROM Company" ); DataSet DS = new DataSet(); OleDbDataAdapter DA = new OleDbDataAdapter(); cnn.Open(); DA.SelectCommand = new OleDbCommand( sql, cnn ); DA.Fill( DS, "Data" ); dg1.SetDataBinding( DS, "Data"); cnn.Close(); } private void dgDoctors_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) { System.Drawing.Point pt = new Point(e.X, e.Y); DataGrid.HitTestInfo hti = dg1.HitTest(pt); if( hti.Type==DataGrid.HitTestType.RowHeader || hti.Type==DataGrid.HitTestType.Cell) { int r = hti.Row; this.tbxEmpresa.Text = dg1[r, 0].ToString(); this.tbxWebSite.Text = dg1[r, 1].ToString(); } if( hti.Type == DataGrid.HitTestType.ColumnHeader ) { this.tbxEmpresa.Text = ""; this.tbxWebSite.Text = ""; } //if(hti.Type == DataGrid.HitTestType.Cell) //{ // dg1.CurrentCell = new DataGridCell(hti.Row, hti.Column); // dg1.Select(hti.Row); //} // //if(hti.Type == DataGrid.HitTestType.Cell) //{ // MessageBox.Show(dg1[hti.Row, hti.Column].ToString()); //} //else if(hti.Type == DataGrid.HitTestType.RowHeader) //ColumnHeader //{ // MessageBox.Show(dg1[hti.Row, 0].ToString()); // MessageBox.Show(dg1[hti.Row, 1].ToString()); // //MessageBox.Show(((DataView) dg1.DataSource).Table.Columns[hti.Column].ToString()); //} } private void Form1_SizeChanged(object sender, System.EventArgs e) { //AlwaysCentered int x; x = this.Width/2 - gbxMain.Width/2; gbxMain.Location = new Point(x,15); } private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) { this.gbxMain.Focus(); } //Extra //private void button1_Click(object sender, System.EventArgs e) //{ // int ri = this.dg1.CurrentRowIndex; // int cn = this.dg1.CurrentCell.ColumnNumber; // int rn = this.dg1.CurrentCell.RowNumber; //} }

Using the Dataset and DefaultViewManager to display data in the Datagrid
using System.Data.OleDb; public class DsDefaultViewManager : System.Windows.Forms.Form { OleDbConnection cnn; DataSet ds1; private System.Windows.Forms.Button btn1; private System.Windows.Forms.DataGrid dg1; private System.ComponentModel.Container components = null; public OleDbConnection OpenCnn() { string s = @"PROVIDER=Microsoft.Jet.OLEDB.4.0; DATA Source=C:\Documents and Settings\Administrator\My Documents\Visual Studio Projects\WindowsForms\Sample.mdb"; cnn = new OleDbConnection( s ); cnn.Open(); return cnn; } public OleDbConnection CloseCnn() { cnn.Close(); return cnn; } private void btn1_Click(object sender, System.EventArgs e) { string sql = string.Format( "SELECT * FROM Company" ); ds1 = new DataSet(); OleDbDataAdapter da = new OleDbDataAdapter(); da.SelectCommand = new OleDbCommand( sql, OpenCnn() ); da.Fill( ds1, "Data" ); dg1.SetDataBinding( ds1, "Data"); CloseCnn(); dg1.DataSource = ds1.DefaultViewManager; // or //DataView dv = new DataView( ds1.Tables["Data"] ); //dg1.DataSource = dv; } }

Add items in the ComboBox
<?xml version="1.0" encoding="utf-8" ?> <configuration> <appSettings> <add key="CbxItem01" value="RM Crânio" /> <add key="CbxItem02" value="RM Perna" /> <add key="CbxItem03" value="RM Braço" /> </appSettings> </configuration> using System.Configuration; public class EditableComboBox : System.Windows.Forms.Form { private System.Windows.Forms.ComboBox cbx01; private System.Windows.Forms.Button button1; private System.ComponentModel.Container components = null; public EditableComboBox() { InitializeComponent(); // Get main list elements from the App.Config this.cbx01.Items.AddRange(new object[] { ConfigurationSettings.AppSettings["CbxItem01"], ConfigurationSettings.AppSettings["CbxItem02"], ConfigurationSettings.AppSettings["CbxItem03"]}); this.AcceptButton = button1; } private void button1_Click(object sender, System.EventArgs e) { if( cbx01.SelectedItem == null ) { if( cbx01.Text.Trim()!="" ) { cbx01.Items.Add( cbx01.Text.Trim() ); MessageBox.Show( cbx01.Text.Trim() ); } else { MessageBox.Show( "Select an Item or Type a New One!" ); } } else { MessageBox.Show( cbx01.SelectedItem.ToString() ); } } }

Using the ErrorProvider Validator
public class Form1 : Form { private TextBox tbxName; private Button btnOk; private System.Windows.Forms.ErrorProvider errorProvider1; private System.Windows.Forms.TextBox textBox1; private Container components = null; public Form1() { InitializeComponent(); // Only enable it after validation is all ok this.btnOk.Enabled = false; // Start Textboxes with an invalid 'flag' (false) this.tbxName.Tag = false; this.tbxName.Validating += new CancelEventHandler( this.tbxEmpty_Validating ); } private void tbxEmpty_Validating(object sender, CancelEventArgs e) { TextBox tbx; tbx = (TextBox)sender; try { if( tbx.Text.Trim().Length == 0 ) { tbx.Tag = false; throw new Exception("Required field"); } else { tbx.Tag = true; this.errorProvider1.SetError( tbx, "" ); } } catch( Exception ex ) { // If you use the Cancel event // you cannot leave the form // until you validate the textboxes //e.Cancel = true; // Select the text to be corrected by the user tbx.Select(0, tbx.Text.Length); // Set the ErrorProvider error with the text to display this.errorProvider1.SetError( tbx, ex.Message ); } EnableBtnOk(); } private void tbxAge_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) { if( (e.KeyChar<48 || e.KeyChar>57) && e.KeyChar!=8 ) { e.Handled = true; } } private void EnableBtnOk() { // Will Enable if All tags == true this.btnOk.Enabled = (bool)this.tbxName.Tag; } }

Fix the Form Size
public FixedFormSize() { InitializeComponent(); this.MaximumSize = new System.Drawing.Size(400, 300); this.MinimumSize = new System.Drawing.Size(400, 300); this.MaximizeBox = false; this.MinimizeBox = false; }

Open the WinForm FullScreen but NOT Maximized
private void FullScreenNotMaximized() { Screen screen = Screen.PrimaryScreen; int w = screen.WorkingArea.Width; int h = screen.WorkingArea.Height; Rectangle rect = new Rectangle(0,0,w,h); StartPosition = FormStartPosition.Manual; this.DesktopBounds = rect; }

Catch the Yes or No event from the MessageBox
public class MessageBoxYesNo : System.Windows.Forms.Form { private System.Windows.Forms.Button btn; private System.ComponentModel.Container components = null; private void btn_Click(object sender, System.EventArgs e) { if( MessageBox.Show( "Delete?", "TitleHere", MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2 ) == DialogResult.Yes ) { //delete MessageBox.Show("Delete True"); } else { //don´t delete MessageBox.Show("Delete False"); } } }

Move folders and files
using System.Windows.Forms.Design; using System.IO; public class MoveFoldersAndFiles : System.Windows.Forms.Form { internal System.Windows.Forms.TextBox tbxOrigin; internal System.Windows.Forms.Button btnOrigin; private void btnOrigin_Click(object sender, System.EventArgs e) { BrowseFolder bf = new BrowseFolder(); tbxOrigin.Text = bf.BrowseDialog("Origin Folder Please!"); MoveIt( tbxOrigin.Text ); } private void MoveIt( string o ) { // Has Files in Origin? DirectoryInfo diO = new DirectoryInfo( o ); FileInfo[] fi = diO.GetFiles(); if( fi.Length > 0 ) { // Create a SubFolder in the Destination string examID = "75"; string d = Path.GetFullPath("."); DirectoryInfo diD = new DirectoryInfo( d ); DirectoryInfo subDir = diD.CreateSubdirectory("FolderBak"); subDir = diD.CreateSubdirectory("FolderBak/"+examID+"/Dicom"); subDir = diD.CreateSubdirectory("FolderBak/"+examID+"/Jpg"); // Move Files foreach( FileInfo file in fi ) { if( file.Extension == "" || file.Extension == ".dcm" ) { file.CopyTo( d + "/FolderBak/"+examID+"/Dicom/" + file.Name, true ); } if( file.Extension == ".jpg" ) { file.CopyTo( d + "/FolderBak/"+examID+"/Jpg/" + file.Name, true ); } } } } } public class BrowseFolder : FolderNameEditor { FolderNameEditor.FolderBrowser bDialog; public BrowseFolder() { bDialog = new FolderNameEditor.FolderBrowser(); } public string BrowseDialog(string title) { bDialog.Description = title; bDialog.StartLocation = FolderNameEditor.FolderBrowserFolder.MyComputer; bDialog.Style = FolderNameEditor.FolderBrowserStyles.RestrictToDomain; bDialog.ShowDialog(); return bDialog.DirectoryPath;; } ~BrowseFolder() { bDialog.Dispose(); } }

Keep original form size after Form Resizing
private void Form1_Resize(object sender, System.EventArgs e) { this.Size = new System.Drawing.Size( 300, 300); }

Open a second form in the center
// Form1 private void button1_Click(object sender, System.EventArgs e) { Form2 f2 = new Form2(); f2.Show(); } // Form2 public Form2() { InitializeComponent(); this.CenterToScreen(); }

Open full screen
public Form1() { InitializeComponent(); this.WindowState = FormWindowState.Maximized; }

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