int的函数类似于string.contains

Question

I have a textbox bind to an int . There is a Search button which gives result on the basis of text in textbox. If the text is 12 , all results having 12 should appear.

Such being the case for string , I would have used string.contains . But I don't know what to do in case of int .

I am using LINQ to filter out results.

int securityId = Convert.int32(filterColumn.Value, CultureInfo.CurrentCulture);
queryResults=queryResults.Where(generaldata=>generaldata.SecuritiesId.Equals(securityId));  

But this isn't working. I tried following

string securityId = Convert.ToString(filterColumn.Value, CultureInfo.CurrentCulture);                                
queryResults=queryResults.Where(generaldata=>generaldata.SecuritiesId.ToString().Contains(securityId));  

But getting LINQ exception that I can't use ToString in expression.

Answer 1

我认为你应该检查少于因为例如，如果你从0到100计数并检查它是否包含12然后是它它包含12因为

12 < 100

Answer 2

Try using SqlFunctions.StringConvert

string securityId = Convert.ToString(filterColumn.Value, CultureInfo.CurrentCulture);    
queryResults=queryResults
      .Where(gd=>SqlFunctions.StringConvert((double)gd.SecuritiesId).Contains(securityId));

PS: SqlFunctions.StringConvert has no overload for int and that's why the casting to double has been done.