大家进来帮我解释段代码。字典跟哈希表

[vincevincevincevince]

public bool Insert(String TableName,Hashtable Cols) //TableName = Topic Cols count = 5
{
int Count = 0;

if (Cols.Count<=0)
{
return true;
}

String Fields = " (";
String Values = " Values(";
foreach(DictionaryEntry item in Cols)
{
if (Count!=0)
{
Fields += ",";
Values += ",";
}
Fields += item.Key.ToString();//字段名 "(Title"
Values += item.Value.ToString();//字段值 "Values('123'"
Count ++;
}
Fields += ")";
Values += ")";

String SqlString = "Insert into "+TableName+Fields+Values;

return Convert.ToBoolean(ExecuteSQL(SqlString));
}

这里面的foreach(DictionaryEntry item in Cols) 是什么意思？

[chailin181]

不就是循环吗，还是我没明白LZ要问什么？

[grearo]

foreach(DictionaryEntry item in Cols)
你可以理解为Cols是DictionaryEntry数组
然后遍历这个数组

[长沙三毛]

foreach(...)是遍历 Hashtable 对象 Cols

[gengwanshanreally]

[Quote=引用楼主 vincevincevincevince 的帖子:]
public bool Insert(String TableName,Hashtable Cols) //TableName = Topic Cols count = 5
{
int Count = 0;

if (Cols.Count <=0)
{
return true;
}

String Fields = " (";
String Values = " Values(";
foreach(DictionaryEntry item in Cols)
{
if (Count!=0)
{
Fields += ",";
Values += ",";
}
Fields += item.Key.ToString();//字段名 "(Title"
Values += it…
[/Quote]
foreach是遍历循环。
item 是DictionaryEntry类型的项
Cols是字典数组