.NET的委托和匿名函数应用一例
闲话休提,大家都是成年人,直接上代码。有代码有J8:
delegate string dlgGetTotal();
void TongJi()
{
dlgGetTotal getTotalInt = () => {//统计整数
int d = 0;
foreach (KeyValuePair<string, string> kvp in dict)
{
d += Convert.ToInt32(kvp.Value);
}
return d.ToString();
};
dlgGetTotal getTotalDecimal = () => {//统计浮点数
decimal d = 0.00m;
foreach (KeyValuePair<string, string> kvp in dict)
{
d += Convert.ToDecimal(kvp.Value);
}
return d.ToString();
};
//标题及左标题
string stotal = "";
switch (tjcontent)
{
case "islandcount":
statTitle = @"楼盘数量";
statUnit = "个";
stotal = getTotalInt();
break;
case "area":
statTitle = @"面积";
statUnit = "平方米";
stotal = getTotalDecimal();
break;
case "huji":
statTitle = @"户籍人口";
statUnit = "人";
stotal = getTotalInt();
break;
case "changzhu":
statTitle = @"常住人口";
statUnit = "人";
stotal = getTotalInt();
break;
}
statTitle += String.Format("统计(合计:{0} {1})",stotal,statUnit);
statUnit = "单位:" + statUnit;
}
以上是一段用于统计数字的代码。数字有整数,也有带小数的浮点数,因此要区别对待。故而用了委托、匿名函数、lambda表达式。
版权声明:本文为博主原屙文章,喜欢你就担走。