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[英]How we can make plain captcha to alphanumeric captcha with case sensitive in Captcha MVC
[英]How can we map a string with case sensitive?
我有我的代码,
string firstLineOfRecord = "front images,Currency Code,Date,BackImages,Domination";
string[] fieldArrayRecord = firstLineOfRecord.Split(',');
string fields = "FrontImages,BackImages,Domination,CurrencyCode,SerialNumber";
string[] fieldArrayList = fields.Split(',');
List<int> mappedList = new List<int>();
for (int i = 0; i< fieldArrayList.Count(); i++)
{
for (int j = 0; j < fieldArrayRecord.Count(); j++)
{
if (fieldArrayList[i] == fieldArrayRecord[j])
{
mappedList.Add(j);
}
}
}
如何将“ Front Images”与“ FrontImages”映射。
作为初学者,我不知道该如何解决。请告诉我如何实现。
对于这种模糊匹配,首先需要标识要忽略的有效标识符(在这种情况下为空格)。
您可以执行以下操作:删除所有这些标识符。 然后比较大小写和文化不敏感。
string normalizedHeaderString = "FrontImages";
string normalizedInputString = "front images";
foreach (string c in new[] { " " }) /* the strings to strip out */
{
normalizedHeaderString = normalizedHeaderString.Replace(c, null);
normalizedInputString = normalizedInputString.Replace(c, null);
}
if (string.Equals( normalizedHeaderString
, normalizedInputString
, StringComparison.OrdinalIgnoreCase
)
)
{ /* do your logic, like saving the index, etc */ }
这有点不客气,但您明白了。 您最好使用StringComparer
的自定义实现,该实现只忽略要删除的字符。
从您的问题中我了解到,您的问题是空格和大小写敏感,因此您可以使用
fieldArrayList[i].Replace(" ","").ToLower() ==
fieldArrayRecord[j].Replace(" ","").ToLower()
class Program
{
static void Main(string[] args)
{
string firstLineOfRecord = "front images,Currency Code,Date,BackImages,Domination";
string[] fieldArrayRecord = firstLineOfRecord.Split(',');
string fields = "FrontImages,BackImages,Domination,CurrencyCode,SerialNumber";
string[] fieldArrayList = fields.Split(',');
List<int> mappedList = new List<int>();
for (int i = 0; i < fieldArrayRecord.Length; i++)
{
if (fieldArrayList.Any(s => string.Equals( fieldArrayRecord[i].Replace(" ", string.Empty), s, StringComparison.OrdinalIgnoreCase)))
{
mappedList.Add(i);
}
}
foreach (int index in mappedList)
{
Console.WriteLine(index);
}
}
}
输出:
0
1
3
4
或使用字典:
class Program
{
static void Main(string[] args)
{
string firstLineOfRecord = "front images,Currency Code,Date,BackImages,Domination";
string fields = "FrontImages,BackImages,Domination,CurrencyCode,SerialNumber";
var dataFields = firstLineOfRecord.Split(',').Select((x, index) => new { FieldName = x.Replace(" ", string.Empty), Index = index });
var tableFields = fields.Split(',').Select((x, index) => new { FieldName = x, Index = index });
Dictionary<int, int> mapping = (from dataField in dataFields
let tableField = tableFields.SingleOrDefault(x => string.Equals(dataField.FieldName, x.FieldName, StringComparison.OrdinalIgnoreCase))
where tableField != null
select new { DF = dataField.Index, TF = tableField.Index })
.ToDictionary(c => c.DF, c => c.TF);
// Test:
string[] dataFieldsArray = firstLineOfRecord.Split(',');
string[] tableFieldsArray = fields.Split(',');
foreach (KeyValuePair<int,int> pair in mapping)
{
Console.WriteLine(
"TableField '{0}' Index {1} has to be mapped to DataField '{2}' Index {3}",
tableFieldsArray[pair.Value], pair.Value, dataFieldsArray[pair.Key],pair.Key);
}
}
}
输出:
TableField 'FrontImages' Index 0 has to be mapped to DataField 'front images' Index 0
TableField 'CurrencyCode' Index 3 has to be mapped to DataField 'Currency Code' Index 1
TableField 'BackImages' Index 1 has to be mapped to DataField 'BackImages' Index 3
TableField 'Domination' Index 2 has to be mapped to DataField 'Domination' Index 4
这是一种使用LINQ查询的方法:
string firstLineOfRecord = "front images,Currency Code,Date,BackImages,Domination";
string[] fieldArrayRecord = firstLineOfRecord.Split(',')
.Select(x => x.Replace(" ", string.Empty))
.ToArray();
// Test it, prints True.
fieldArrayRecord.Contains("FrontImages", StringComparer.OrdinalIgnoreCase)
请注意,这将替换这些字母之间的所有空白,并会更改给定的fieldArrayRecord
。
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