this 用法

[gw0703]

求构造函数中this 用法

功能和例子

thanks...

[liherun]

class a
{
private canshu;
public a(string canshu)
this.canshu=canshu;
}
this.canshu中的this表示类本身
this.canshu就是类的成员 指的是类的属性
canshu就是构造函数中的参数了

[longhair9711]

class A
{
private string str1;
public A(string str2)
{
this.str1 = str2;
}
}

[ztenv]

构造函数中可以不用也可以用：
class aa
{
int no;

public aa(int no){this.no=no;}

}

[wangkuang5]

class TA_INIDocument
{

public TA_INIDocument(){}
public TA_INIDocument(string path):this(){
//ini文件读路径，然后ReadAllText( )，等等其它操作,构造函数在原有基础上重载

}

        #region TA_INIDocument
        Dictionary<string, System.Collections.Specialized.NameValueCollection> data =
           new Dictionary<string, NameValueCollection>();
        static readonly System.Text.RegularExpressions.Regex regRemoveEmptyLines =
          new System.Text.RegularExpressions.Regex
          (
              @"(\s*;[\d\D]*?\r?\n)+|\r?\n(\s*\r?\n)*",
              System.Text.RegularExpressions.RegexOptions.Multiline | System.Text.RegularExpressions.RegexOptions.Compiled
          );

        static readonly System.Text.RegularExpressions.Regex regParseIniData =
            new System.Text.RegularExpressions.Regex
            (
                @"
                (?<IsSection>
                    ^\s*\[(?<SectionName>[^\]]+)?\]\s*$
                )
                |
                (?<IsKeyValue>
                    ^\s*(?<Key>[^(\s*\=\s*)]+)?\s*\=\s*(?<Value>[\d\D]*)$
                )",
                 System.Text.RegularExpressions.RegexOptions.Compiled |
                 System.Text.RegularExpressions.RegexOptions.IgnoreCase |
                 System.Text.RegularExpressions.RegexOptions.IgnorePatternWhitespace
            );
        public void ReadAllText( )
        {
            string fullpath = Application.StartupPath + "\\" + EMPSystemConfigurations.INI_CFG_PATH;
            data.Clear();
            string lastSection = string.Empty;
            data.Add(lastSection, new NameValueCollection());

            string iniData;
            using (StreamReader reader = new StreamReader(fullpath))
            {
                iniData = reader.ReadToEnd();
            }

            iniData = regRemoveEmptyLines.Replace(iniData, "\n");

            string[] lines = iniData.Split(new char[] { '\n' }, StringSplitOptions.RemoveEmptyEntries);

            foreach (string s in lines)
            {
                Match m = regParseIniData.Match(s);
                if (m.Success)
                {
                    if (m.Groups["IsSection"].Length > 0)
                    {
                        string sName =m.Groups["SectionName"].Value.ToLowerInvariant();
                        if (lastSection != sName)
                        {
                            lastSection = sName;
                            if (!data.ContainsKey(sName))
                            {
                                data.Add(sName, new NameValueCollection());
                            }
                        }
                    }
                    else if (m.Groups["IsKeyValue"].Length > 0)
                    {
                        data[lastSection].Add(m.Groups["Key"].Value,m.Groups["Value"].Value);
                    }
                }
            }
           
        }
        public NameValueCollection this[string section]
        {
            get
            {
                section = section.ToLowerInvariant();
                if (!data.ContainsKey(section))
                    data.Add(section, new NameValueCollection());
                return data[section];
            }
        }


//this当做索引器，直接取值
        public string this[string section, string key]
        {
            get
            {
                return this[section][key];
            }
            //set
            //{
            //    this[section][key] = value;
            //}
        }
        #endregion
    }

[gw0703]

我要这种：

class baseClass
{ public baseClass(int a)


}

class driveredClass:baseClass
{
public driveredClass:this(int a)
}


这种是什么意思：this

[vrhero]

[Quote=引用 5 楼 gw0703 的回复:]
我要这种：

class baseClass
{ public baseClass(int a)


}

class driveredClass:baseClass
{
  public driveredClass:this(int a)
}


这种是什么意思：this
[/Quote]
构造函数重载...去看MSDN...

[gw0703]

就是在看。。给看不转。。。

没例子。看不是很明白。。。。