[英]How to return a jagged array
I have a function which use a 2D jagged array to save records from an SQL query. 我有一个函数,该函数使用2D锯齿状数组来保存SQL查询中的记录。
How do return the jagged array correctly? 如何正确返回锯齿状数组?
I tried something like: 我尝试了类似的东西:
public string[][] GetResult()
{
return result;
}
And in my main programm: 在我的主程序中:
string[][] test = new string[server1.GetResult().Length][];
test = server1.GetResult();
Well, as expected, it didn't work. 好了,正如预期的那样,它没有用。
I don't know how to fix my problem. 我不知道如何解决我的问题。
Jagged arrays are simply arrays of arrays. 锯齿状的数组只是数组的数组。
In your code: 在您的代码中:
string[][] test = new string[server1.GetResult().Length][];
test = Gronforum.GetResult();
You first assign a new array to test
, then overwrite it with the return value from GetResult()
. 您首先分配一个新数组进行
test
,然后用GetResult()
的返回值覆盖它。 The code does the same as: 该代码与以下代码相同:
string[][] test = Gronforum.GetResult();
Now the GetResult()
should return a string[][]
- try this to get a feel of working with jagged arrays: 现在,
GetResult()
应该返回一个string[][]
-尝试使用这种方法来处理锯齿状数组:
public string[][] GetResult()
{
string[][] result = new string[2][];
result[0] = new string[] { "1", "2" };
result[1] = new string[2];
result[1][0] = "a";
result[1][1] = "b";
return result;
}
You could supply a reference to the result of the SQL operation to that method so it has access to the data, to "convert" it to a string[][]
. 您可以提供对该方法的SQL操作结果的引用,以便它可以访问数据,以将其“转换”为
string[][]
。
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