ColorBuilder Class

Definition

Namespace:

System.Web.UI.Design

Assembly:

System.Design.dll

Provides an HTML color string builder at design time that allows a user to select a color.

C#

public sealed class ColorBuilder

Inheritance

Object

ColorBuilder

Examples

C#

// Create a parent control.
System.Windows.Forms.Control c = new System.Windows.Forms.Control();            
c.CreateControl();            

// Launch the Color Builder using the specified control 
// parent and an initial HTML format ("RRGGBB") color string.
System.Web.UI.Design.ColorBuilder.BuildColor(this.Component, c, "405599");

C#

// Example designer provides a designer verb menu command to launch the 
// BuildColor method of the ColorBuilder.
[System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.InheritanceDemand, Name="FullTrust")]
[System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]
public class ColorBuilderDesigner : System.Web.UI.Design.UserControlDesigner
{
    public ColorBuilderDesigner()
    {
    }

    // Provides a designer verb menu command for invoking the BuildColor 
    // method of the ColorBuilder.
    public override System.ComponentModel.Design.DesignerVerbCollection Verbs
    {
        get
        {
            DesignerVerbCollection dvc = new DesignerVerbCollection();                               
            dvc.Add( new DesignerVerb("Launch Color Builder UI", new EventHandler(this.launchColorBuilder)) ); 
            return dvc;
        }
    }

    // This method handles the "Launch Color Builder UI" menu command.
    // Invokes the BuildColor method of the System.Web.UI.Design.ColorBuilder.
    private void launchColorBuilder(object sender, EventArgs e)
    {
        // Create a parent control.
        System.Windows.Forms.Control c = new System.Windows.Forms.Control();            
        c.CreateControl();            
        
        // Launch the Color Builder using the specified control 
        // parent and an initial HTML format ("RRGGBB") color string.
        System.Web.UI.Design.ColorBuilder.BuildColor(this.Component, c, "405599");
    }
}

// Example Web control displays the value of its text property.
// This control is associated with the ColorBuilderDesigner.
[DesignerAttribute(typeof(ColorBuilderDesigner), typeof(IDesigner))]
public class ColorBuilderControl : System.Web.UI.WebControls.WebControl
{
    private string text;

    [Bindable(true),
    Category("Appearance"),
    DefaultValue("")]
    public string Text
    {
        get
        {
            return text;
        }

        set
        {
            text = value;
        }
    }

    protected override void Render(HtmlTextWriter output)
    {
        output.Write(Text);
    }
}

Remarks

The BuildColor method starts a user interface for selecting a color value.

The ColorBuilder class is not intended for use outside of the design time environment. ColorBuilder requires the IWebFormsBuilderUIService, which is typically available within a Web Forms project at design time. If you want to build HTML color strings, you may want to implement a method that converts the RGB values of a Color object to an HTML-compatible RRGGBB format string. If you intend to use a control to select a color or configure a color, you can build a user interface for this, or you may want to use a PropertyGrid control which allows you to edit Color properties with the default ColorEditor providing a color selection interface.

Methods

BuildColor(IComponent, Control, String)	Starts a color editor to build an HTML color property value.
Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetType()	Gets the Type of the current instance. (Inherited from Object)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
ToString()	Returns a string that represents the current object. (Inherited from Object)

Applies to