.NET下一种简单的调试诊断方法(2)

根据上篇中介绍的策略，每一个调用栈在进入和离开时都要进行类似下面的处理：

/**//// <summary>
        /// Gets the name.
        /// </summary>
        /// <returns></returns>
        public string getName()
        {
            string ret = "";

            MethodInfo method = (MethodInfo)MethodInfo.GetCurrentMethod();
            Debug.WriteLine(string.Format("Enter {0}.{1}", method.DeclaringType.FullName, method.Name));
            Debug.Indent();
            {
                this._cmdrp.Item = new noParamType();
                this.internalExecute();
                ret=((stringReturnType)this._replyrp.Item).returnValue;
            }
            Debug.Unindent();
            Debug.WriteLine(string.Format("Leave {0}.{1}", method.DeclaringType.FullName, method.Name));

            return ret;
        }

由此带来的问题是：当调用层次太深的时候，输出的调试信息量太多了，虽然层次分明的缩进可以帮我们理清思路，但是在纷繁众多的信息中想要找到我们所需的谈何容易啊，如下所示：


因此考虑根据缩进层次着色，幸好我采用的是RichTextBox，太容易了，修改上篇中的继承类中的函数如下：

private void WriteImpl(string message)
        {
            if (this.NeedIndent)
            {
                this.WriteIndent();
                this.NeedIndent = true;
            }
            Color color = new Color();
            switch (this.IndentLevel)
            {
                case 0:
                    color = Color.FromArgb(0, 250, 0);
                    break;
                case 1:
                    color = Color.FromArgb(50, 200, 0);
                    break;
                case 2:
                    color = Color.FromArgb(100, 150, 0);
                    break;
                case 3:
                    color = Color.FromArgb(150, 100, 0);
                    break;
                case 4:
                    color = Color.FromArgb(200, 50, 0);
                    break;
                default:
                    color = Color.FromArgb(250, 0, 0);
                    break;
            }
            this._richTextBox.Select(this._richTextBox.Text.Length, 0);
            this._richTextBox.SelectionBackColor = color;
            this._richTextBox.AppendText(message);
            this._richTextBox.Select(this._richTextBox.Text.Length, 0);
            this._richTextBox.ScrollToCaret();
        }

具体的颜色值可以根据自己的爱好进行调整，最终的调试输出如下：


瞧，是不是很有层次感啊！ 完整源码如下：

MyTraceListener
using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using System.Windows.Forms;
using System.Drawing;

namespace RPTestApp
{
    class MyTraceListener : TraceListener
    {
        private RichTextBox _richTextBox = null;

        public MyTraceListener(RichTextBox richTextBox)
        {
            this._richTextBox = richTextBox;
        }

        private delegate void WriteDelegate(string message);
        private void WriteImpl(string message)
        {
            if (this.NeedIndent)
            {
                this.WriteIndent();
                this.NeedIndent = true;
            }
            Color color = new Color();
            switch (this.IndentLevel)
            {
                case 0:
                    color = Color.FromArgb(0, 250, 0);
                    break;
                case 1:
                    color = Color.FromArgb(50, 200, 0);
                    break;
                case 2:
                    color = Color.FromArgb(100, 150, 0);
                    break;
                case 3:
                    color = Color.FromArgb(150, 100, 0);
                    break;
                case 4:
                    color = Color.FromArgb(200, 50, 0);
                    break;
                default:
                    color = Color.FromArgb(250, 0, 0);
                    break;
            }
            this._richTextBox.Select(this._richTextBox.Text.Length, 0);
            this._richTextBox.SelectionBackColor = color;
            this._richTextBox.AppendText(message);
            this._richTextBox.Select(this._richTextBox.Text.Length, 0);
            this._richTextBox.ScrollToCaret();
        }

        public override void Write(string message)
        {
            //This is for thread safety
            this._richTextBox.Invoke(new WriteDelegate(this.WriteImpl), new object[] { message });
        }

        public override void WriteLine(string message)
        {
            this.Write(message + Environment.NewLine);
        }

    }
}