|
public ConvertFromString ( ITypeDescriptorContext context, |
||
| context | ITypeDescriptorContext | |
| culture | ||
| text | string | |
| return | object | |
void radListControl1_VisualItemFormatting(object sender, Telerik.WinControls.UI.VisualItemFormattingEventArgs args)
{
RadListVisualItem item = args.VisualItem;
int rowIndex = item.Data.RowIndex;
System.ComponentModel.TypeConverter typeConverter = TypeDescriptor.GetConverter(typeof(Color));
item.DrawFill = true;
item.BackColor = (Color)typeConverter.ConvertFromString(null, CultureInfo.InvariantCulture, bgColors[rowIndex % 7]);
item.GradientStyle = Telerik.WinControls.GradientStyles.Solid;
}
public static System.Drawing.Font StringToFont(string fontString)
{
try
{
System.ComponentModel.TypeConverter converter =
System.ComponentModel.TypeDescriptor.GetConverter(typeof(System.Drawing.Font));
return((System.Drawing.Font)converter.ConvertFromString(fontString));
}
catch
{
return(null);
}
}
// The following code example demonstrates how to use the
// PointConverter.ConvertFromString and the Point.op_Subtraction
// methods. This example is designed to be used with Windows
// Forms. Paste this code into a form and call the
// ShowPointConverter method when handling the form's Paint
// event, passing e as PaintEventArgs.
//<snippet1>
private void ShowPointConverter(PaintEventArgs e)
{
// Create the PointConverter.
System.ComponentModel.TypeConverter converter =
System.ComponentModel.TypeDescriptor.GetConverter(typeof(Point));
Point point1 = (Point)converter.ConvertFromString("200, 200");
// Use the subtraction operator to get a second point.
Point point2 = point1 - new Size(190, 190);
// Draw a line between the two points.
e.Graphics.DrawLine(Pens.Black, point1, point2);
}
//</snippet2>
// The following code example demonstrates how to use the
// ConvertToInvariantString and ConvertToString methods.
// This example is designed to be used with Windows Forms.
// Paste this code into a form and call the ShowFontStringConversion
// method when handling the form's Paint event, passing e
// as PaintEventArgs.
//<snippet3>
private void ShowFontStringConversion(PaintEventArgs e)
{
// Create the FontConverter.
System.ComponentModel.TypeConverter converter =
System.ComponentModel.TypeDescriptor.GetConverter(typeof(Font));
Font font1 = (Font)converter.ConvertFromString("Arial, 12pt");
string fontName1 = converter.ConvertToInvariantString(font1);
string fontName2 = converter.ConvertToString(font1);
e.Graphics.DrawString(fontName1, font1, Brushes.Red, 10, 10);
e.Graphics.DrawString(fontName2, font1, Brushes.Blue, 10, 30);
}
private static object ParseProperty( PropertyInfo property, string valueString, TypeConverter converter )
{
try
{
return converter.ConvertFromString( valueString );
}
catch ( Exception ex )
{
throw new PropertyParsingException(
property,
valueString,
String.Format( _parsingErrorFormat, property.DeclaringType.Name, property.Name, property.PropertyType.Name, valueString ), ex );
}
}
/// <summary>
/// 从配置参数存储中装载字体设置信息
/// </summary>
public void LoadFontSetting()
{
if (this.MainForm == null)
{
return;
}
if (this.MainForm != null && this.MainForm.AppInfo != null)
{
string strFontString = MainForm.AppInfo.GetString(
this.FormName,
"default_font",
""); // "Arial Unicode MS, 12pt"
if (String.IsNullOrEmpty(strFontString) == false)
{
// Create the FontConverter.
System.ComponentModel.TypeConverter converter =
System.ComponentModel.TypeDescriptor.GetConverter(typeof(Font));
this.Font = (Font)converter.ConvertFromString(strFontString);
}
else
{
// 沿用系统的缺省字体
if (this.MainForm != null)
{
MainForm.SetControlFont(this, this.MainForm.DefaultFont);
}
}
string strFontColor = MainForm.AppInfo.GetString(
this.FormName,
"default_font_color",
"");
if (String.IsNullOrEmpty(strFontColor) == false)
{
// Create the ColorConverter.
System.ComponentModel.TypeConverter converter =
System.ComponentModel.TypeDescriptor.GetConverter(typeof(Color));
this.ForeColor = (Color)converter.ConvertFromString(strFontColor);
}
this.PerformLayout();
}
}
private static void Label_set(Label l, Color c, int x, int y, int w, int h)
{
System.ComponentModel.TypeConverter converter =
System.ComponentModel.TypeDescriptor.GetConverter(typeof(Font));
Font f = (Font)converter.ConvertFromString("Cambria, 18pt, style=Bold, Italic");
l.Font = f;
l.BackColor = Color.Black;
l.Visible = false;
l.ForeColor = c;
l.Top = x;
l.Left = y;
l.Width = w;
l.Height = h;
}
private static void setPropertyValue(PropertyInfo pi, Type propertyType, object oObj, string value)
{
if (propertyType == typeof(string))
{
pi.SetValue(oObj, value, null);
return;
}
object[] attributes = propertyType.GetCustomAttributes(typeof(System.ComponentModel.TypeConverterAttribute), false);
foreach (System.ComponentModel.TypeConverterAttribute converterAttribute in attributes)
{
System.ComponentModel.TypeConverter converter = (System.ComponentModel.TypeConverter)Activator.CreateInstance(Type.GetType(converterAttribute.ConverterTypeName));
if (converter.CanConvertFrom(value.GetType()))
{
// good - use the converter to restore the value
pi.SetValue(oObj, converter.ConvertFromString(value), null);
break;
}
}
}
public virtual void RestoreSettings(XmlElement element)
{
foreach (PropertyInfo pi in GetType().GetProperties())
{
// Should be only one
foreach (XmlElement propertyElem in element.GetElementsByTagName(pi.Name))
{
System.ComponentModel.TypeConverter converter = System.ComponentModel.TypeDescriptor.GetConverter(pi.PropertyType);
if (converter != null)
{
try
{
pi.SetValue(this, converter.ConvertFromString(propertyElem.InnerText));
} catch (Exception)
{
}
}
}
}
}
/// <summary>
/// Handles <color=value>
/// </summary>
/// <param name="tag"></param>
/// <param name="oldColor"></param>
/// <returns></returns>
private static Color ParseColor(string tag, Color?oldColor)
{
Color result = Control.DefaultForeColor;
if (oldColor.HasValue)
{
result = oldColor.Value;
}
try
{
result = (Color)typeConverter.ConvertFromString(null, CultureInfo.InvariantCulture, tag);
}
catch (Exception)
{
//failed to convert color
}
return(result);
}
public DefaultValueAttribute(Type type, string value)
{
try {
#if NET_2_1
if (type.IsEnum)
{
DefaultValue = Enum.Parse(type, value);
}
else if (type == typeof(TimeSpan))
{
DefaultValue = TimeSpan.Parse(value);
}
else
{
DefaultValue = Convert.ChangeType(value, type, null);
}
#else
TypeConverter converter = TypeDescriptor.GetConverter(type);
DefaultValue = converter.ConvertFromString(null, CultureInfo.InvariantCulture, value);
#endif
} catch { }
}
private void button_ui_getDefaultFont_Click(object sender, EventArgs e)
{
Font font = null;
if (String.IsNullOrEmpty(this.textBox_ui_defaultFont.Text) == false)
{
// Create the FontConverter.
System.ComponentModel.TypeConverter converter =
System.ComponentModel.TypeDescriptor.GetConverter(typeof(Font));
font = (Font)converter.ConvertFromString(this.textBox_ui_defaultFont.Text);
}
else
{
font = Control.DefaultFont;
}
FontDialog dlg = new FontDialog();
dlg.ShowColor = false;
dlg.Font = font;
dlg.ShowApply = false;
dlg.ShowHelp = true;
dlg.AllowVerticalFonts = false;
if (dlg.ShowDialog(this) != DialogResult.OK)
{
return;
}
{
// Create the FontConverter.
System.ComponentModel.TypeConverter converter =
System.ComponentModel.TypeDescriptor.GetConverter(typeof(Font));
this.textBox_ui_defaultFont.Text = converter.ConvertToString(dlg.Font);
}
}
Func <object, bool> SetupComparer ()
{
Type ot = OperandType;
object min = Minimum, max = Maximum;
#if NET_4_0
if (min == null || max == null)
throw new InvalidOperationException ("The minimum and maximum values must be set.");
#endif
if (min is int)
return new Func <object, bool> (CompareInt);
if (min is double)
return new Func <object, bool> (CompareDouble);
if (ot == null)
throw new InvalidOperationException ("The OperandType must be set when strings are used for minimum and maximum values.");
if (!typeof(IComparable).IsAssignableFrom (ot)) {
#if NET_4_0
string message = String.Format ("The type {0} must implement System.IComparable", ot.FullName);
throw new InvalidOperationException (message);
#else
throw new ArgumentException ("object");
#endif
}
string smin = min as string, smax = max as string;
cvt = TypeDescriptor.GetConverter (ot);
Minimum = cvt.ConvertFromString (smin);
Maximum = cvt.ConvertFromString (smax);
return new Func <object, bool> (CompareArbitrary);
}
private void LoadFontSettings()
{
System.ComponentModel.TypeConverter converter = System.ComponentModel.TypeDescriptor.GetConverter(typeof(Font));
this.Font = (Font)converter.ConvertFromString(ConfigurationManager.AppSettings["fontSettings"]);
}
public static Keys ConvertCharToVirtualKey(string key)
{
System.ComponentModel.TypeConverter converter = TypeDescriptor.GetConverter(typeof(Keys));
return((Keys)converter.ConvertFromString(key));
}
private Font stringToFont(String font)
{
System.ComponentModel.TypeConverter converter = System.ComponentModel.TypeDescriptor.GetConverter(typeof(Font));
return((Font)converter.ConvertFromString(font));
}
