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Articles / Desktop Programming / Windows Forms

Zeta HTML Edit Control

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9 Jul 2013CPOL3 min read 213.4K   20.8K   183  
A small wrapper class around the Windows Forms 2.0 WebBrowser control
namespace ZetaHtmlEditControl
{
	using System;
	using System.ComponentModel;
	using System.Drawing;
	using System.Globalization;
	using System.Windows.Forms;

	internal partial class HtmlSourceTextEditForm :
		Form
	{
		public HtmlSourceTextEditForm(
			string htmlCode )
		{
			InitializeComponent();

			textboxEdit.Text = string.IsNullOrEmpty( htmlCode ) ? string.Empty : htmlCode.Trim();
		}

		private void HtmlSourceTextEditForm_Load( object sender, EventArgs e )
		{
			if ( ExternalInformationProvider != null )
			{
				Width = Convert.ToInt32(
					ExternalInformationProvider.RestorePerUserPerWorkstationValue(
						StoreID + @".Width",
						Width.ToString(CultureInfo.InvariantCulture) ) );
				Height = Convert.ToInt32(
					ExternalInformationProvider.RestorePerUserPerWorkstationValue(
						StoreID + @".Height",
						Height.ToString(CultureInfo.InvariantCulture) ) );

				wordWrapCheckBox.Checked =
					Convert.ToBoolean(
					ExternalInformationProvider.RestorePerUserPerWorkstationValue(
						StoreID + @".WordWrap",
						wordWrapCheckBox.Checked.ToString() ) );
			}
			CenterToParent();

			if ( !DesignMode )
			{
				if ( !_hasConsolasChecked )
				{
					_hasConsolasChecked = true;

					var families = FontFamily.Families;

					foreach ( var family in families )
					{
						if ( string.Compare(family.Name, @"Consolas", StringComparison.OrdinalIgnoreCase) == 0 )
						{
							_hasConsolas = true;
							break;
						}
					}
				}

				if ( _hasConsolas )
				{
					textboxEdit.Font = new Font( @"Consolas", textboxEdit.Font.Size );
				}
			}

			textboxEdit.Select( 0, 0 );
		}

		private static bool _hasConsolas;
		private static bool _hasConsolasChecked;

		[Browsable( false )]
		[EditorBrowsable( EditorBrowsableState.Never )]
		[DesignerSerializationVisibility( DesignerSerializationVisibility.Hidden )]
		internal IExternalInformationProvider ExternalInformationProvider
		{
			get;
			set;
		}

		internal string StoreID
		{
			get
			{
				return string.Format(
					@"{0}.{1}.{2}",
					GetType().Name,
					Name,
					Text );
			}
		}

		private void HtmlSourceTextEditForm_FormClosing(
			object sender,
			FormClosingEventArgs e )
		{
			if ( ExternalInformationProvider != null )
			{
				ExternalInformationProvider.SavePerUserPerWorkstationValue(
					StoreID + @".Width",
					Width.ToString(CultureInfo.InvariantCulture) );
				ExternalInformationProvider.SavePerUserPerWorkstationValue(
					StoreID + @".Height",
					Height.ToString(CultureInfo.InvariantCulture) );
				ExternalInformationProvider.SavePerUserPerWorkstationValue(
					StoreID + @".WordWrap",
					wordWrapCheckBox.Checked.ToString() );
			}
		}

		private void buttonCancel_Click( object sender, EventArgs e )
		{
			Close();
		}

		private void buttonOK_Click( object sender, EventArgs e )
		{
			Close();
		}

		public string HtmlText
		{
			get
			{
				return textboxEdit.Text.Trim();
			}
		}

		private void wordWrapCheckBox_CheckedChanged(
			object sender,
			EventArgs e )
		{
			textboxEdit.WordWrap = wordWrapCheckBox.Checked;
		}

		private void textboxEdit_KeyDown( object sender, KeyEventArgs e )
		{
			if ( e.Control && e.KeyCode == Keys.A )
			{
				textboxEdit.SelectAll();
			}
		}
	}
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Chief Technology Officer Zeta Software GmbH
Germany Germany
Uwe does programming since 1989 with experiences in Assembler, C++, MFC and lots of web- and database stuff and now uses ASP.NET and C# extensively, too. He has also teached programming to students at the local university.

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In his free time, he does climbing, running and mountain biking. In 2012 he became a father of a cute boy and in 2014 of an awesome girl.

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