善用視覺化偵錯工具改善程式開發效率
文／沈炳宏

==========程式=========
程式1
class Customer
    {
        private string name = "name";
        public string Name
        {
            get { return name; }
            set { name = value; }
        }
        private string address="address";
        public string Address
        {
            get { return address; }
            set { address = value; }
        }
        private string email="email";
        public string Email
        {
            get { return email; }
            set { email = value; }
        }
        private string phone="phone";
        public string Phone
        {
            get { return phone; }
            set { phone = value; }
        }
    }

==========程式=========

==========程式=========
程式2
    [DebuggerDisplay("Customer ( {Name} )")]
    class Customer
    {
…
}

==========程式=========

==========程式=========
程式3
[DebuggerTypeProxy(typeof(ProductProxy))]
    class Product
    {
        private string _attribute1;
        private string _attribute2;
        private string _attribute3;
        private string _attribute4;
        private string _attribute5;

        public Product(string attribute1, 
string attribute2, string attribute3, 
string attribute4, string attribute5)
        {
            _attribute1 = attribute1;
            _attribute2 = attribute2;
            _attribute3 = attribute3;
            _attribute4 = attribute4;
            _attribute5 = attribute5;
        }
        internal class ProductProxy
        {
            public ProductProxy(Product product)
            {
                _product = product;
            }
            public string Product
            {
                get
                {
StringBuilder sb = new StringBuilder(
_product._attribute1);
if (null != _product._attribute2)
sb.AppendFormat(", {0}", _product._attribute2);
if (null != _product._attribute3)
sb.AppendFormat(", {0}", _product._attribute3);
if (null != _product._attribute4)
sb.AppendFormat(", {0}", _product._attribute4);
if (null != _product._attribute5)
sb.AppendFormat(", {0}", _product._attribute5);
return sb.ToString();
                }
            }
            private Product _product;
        }
    }

==========程式=========

==========程式=========
程式4
class Base64VisualizerObjectSource : 
VisualizerObjectSource
    {
     public override void GetData(object target,
System.IO.Stream outgoingData)
     {
        BinaryFormatter formatter = 
new BinaryFormatter();
        formatter.Serialize(outgoingData, target);
     }

==========程式=========

==========程式=========
程式5
程式5
public partial class Base64StringVisualizerForm 
: Form
   {
private IVisualizerObjectProvider _objectSource;
public Base64StringVisualizerForm(
IVisualizerObjectProvider objectSource)
     {
         _objectSource = objectSource;
         InitializeComponent();
     }
     private void Form1_Load(object sender, 
EventArgs e)
     {
        PopulateForm();
     }
     private void PopulateForm()
     {
        BinaryFormatter formatter = new 
BinaryFormatter();
        string base64string = 
                 (string) formatter.Deserialize(
_objectSource.GetData());
        tbBase64.Text = base64string;
            tbPlainText.Text = base64Decode(
base64string);
     }
private string base64Decode(string base64string)
     {
         try
         {
             UnicodeEncoding encoder = new 
UnicodeEncoding();
             string textString = 
                   encoder.GetString(
Convert.FromBase64String(base64string));
             return textString;
         }
         catch (Exception e)
         {
             throw new Exception("解碼錯誤", e);
         }
     }
     private string base64Encode(string textString)
     {
         try
         {
            string base64string = 
                Convert.ToBase64String(
ConvertStringToByteArray(textString));
            return base64string;
         }
         catch (Exception e)
         {
             throw new Exception("編碼錯誤", e);
         }
    }
    public static byte[] ConvertStringToByteArray(s
tring stringToConvert)
    {
         return (new UnicodeEncoding()).
GetBytes(stringToConvert);
    }
    private void btnCancel_Click(object sender, 
EventArgs e)
    {
        this.Close();
    }
    private void btnOK_Click(object sender, 
EventArgs e)
    {
         string base64string = 
base64Encode(tbPlainText.Text);
         _objectSource.ReplaceObject(base64string);
         this.Close();
    }   
  }

==========程式=========

==========程式=========
程式6
[assembly: DebuggerVisualizer(typeof(
Base64StringVisualizer.DebuggerSide),
   typeof(Base64StringVisualizer.
Base64VisualizerObjectSource),
   Target = typeof(string), Description =
 "Base64 字串視覺化檢視")]
namespace Base64StringVisualizer 
{
    public class DebuggerSide : 
DialogDebuggerVisualizer
    {
        protected override void Show(
IDialogVisualizerService windowService,
IVisualizerObjectProvider objectProvider)
        {
Base64StringVisualizerForm form =
new Base64StringVisualizerForm(objectProvider);
windowService.ShowDialog(form);
        }
    }
}

==========程式=========

==========程式=========
程式7
string s = "RUN!PC";
string base64string = base64Encode(s);
VisualizerDevelopmentHost visualizerHost = 
new VisualizerDevelopmentHost(base64string, 
typeof(Base64StringVisualizer));
visualizerHost.ShowVisualizer();

==========程式=========