Convert VB code to C # using array and redim preserver keyword
This is my VB code:
If TxtStr(i) = "#" And TxtStr(i + 1) = "]" Then
RefStr = RefStr & "]"
ReDim Preserve RefStrLinks(1, RefStrLinkIndex)
RefStrLinks(0, RefStrLinkIndex) = RefStr
RefStr = RefStr.Replace("[#", String.Empty)
RefStr = RefStr.Replace("#]", String.Empty)
RefStrLinks(1, RefStrLinkIndex) = RefStr
RefStrLinkIndex = RefStrLinkIndex + 1
RefStr = String.Empty
RefStrFound = False
End If
This is my converted code in C #; RefStrLinks
declared as:
string[,] RefStrLinks = null;
But it gives a compilation error because of ReDim Preserve
whenever I run this:
if (TxtStr[i].ToString() == "#" & TxtStr[i + 1].ToString() == "]")
{
RefStr = RefStr + "]";
Array.Resize<string>(ref RefStrLinks, RefStrLinkIndex + 1);
RefStrLinks[0, RefStrLinkIndex] = RefStr;
RefStr = RefStr.Replace("[#", string.Empty);
RefStr = RefStr.Replace("#]", string.Empty);
RefStrLinks(1, RefStrLinkIndex) = RefStr;
RefStrLinkIndex = RefStrLinkIndex + 1;
RefStr = string.Empty;
RefStrFound = false;
}
Does anyone understand why?
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on right; I think the real problem is that you have a two dimensional array; RefStrLinks
is not string[]
, but rather is string[,]
, with dimension 2 on the first axis. Array.Resize
works only with vectors ("vector" is a one-dimensional array with base index 0, ie string[]
).
Quite frankly, I would replace the whole thing (re-dimming the array, or using it Array.Resize
for an element is absurdly expensive) with something like:
List<SomeBasicType> list = ...
...
// where "foo" and "bar" are the two values that you intend to store per item
var item = new SomeBasicType(foo, bar);
list.Add(item);
where possible SomeBasicType
, an immutable structure that takes two lines. Or, more simply, in C # "current": value type tuples:
// declare the list (change the names to something meaningful for your code)
var list = new List<(string name, string url)>();
// ... add values efficiently
string name = "whatever"; // your per-item code goes here
string url = "some value"; // and here
list.Add((name, url));
// ... show that we have the data
foreach(var item in list)
{
Console.WriteLine($"{item.name} / {item.url}");
}
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