implemented prefix full-text search

Diligent.WebAPI.Business/Services/FileEntityService.cs

         public async Task<object> GetAllFiltered(FileFilter filters)
         {
             using var connection = new SqlConnection(_configuration.GetConnectionString("WebApi"));
-           
+
             var sql = @"SELECT Files.Id as FileId, Files.Deleted, stream_id, DocumentOrganizerDocStore.name as FileName, file_stream, file_type, cached_file_size, Title, Tags.Id as TagId, Tags.Name as TagName, Categories.Id as CategoryId, Categories.Name as CategoryName
                         FROM Files inner join FileEntityTag on Files.Id = FileEntityTag.FilesId 
                         inner join Tags on FileEntityTag.TagsId = Tags.Id 
                         inner join Categories on Files.CategoryId = Categories.Id
                         inner join DocumentOrganizerDocStore on DocumentOrganizerDocStore.stream_id = Files.DocumentId WHERE Files.Deleted = 0" +
-                        (filters.Content is null ? "" : $" where contains(DocumentOrganizerDocStore.file_stream,@content);");
+            (filters.Content is null ? "" : " and contains(DocumentOrganizerDocStore.file_stream," + "'\"" + filters.Content + "*\"')");
 
             var files = await connection.QueryAsync<FileFilterReturn, TagResponse, CategoryResponse, FileFilterReturn>(sql,(file, tag, category) =>
             {
                 file.Tags.Add(tag);
                 file.Category = category;
                 return file;
-            }, splitOn: "TagId, CategoryId",
-               param:new {content = filters.Content});
+            }, splitOn: "TagId, CategoryId");
 
             var filesList = new List<FileFilterReturnDto>();
             foreach (var fileItem in files.ToList())
                     Title = fileItem.Title
                 };
                 // return File_stream in base64 format
-                MemoryStream stream = new MemoryStream(fileItem.File_stream);
+                MemoryStream stream = new (fileItem.File_stream);
                 fileFilterReturnDto.File_stream = ConvertToBase64(stream);
                 filesList.Add(fileFilterReturnDto);
             }