Reads data frm config file

Question

Hi I have code which is set 25 string lenght [StringLength(25 ErrorMessageResourceType = typeof(CampaignResource.VendorCampaign) ErrorMessageResourceName = InvalidLengthDescription1)] Now i dnt want to set that length constant i need to change according to config file valuewhat value i am giving in config that value should take .How can do by using custom Attributeplz gve sample code

Tejas Trivedi · Answer

Hi Nageshwar Could you please check what VendorCampaignSettings.NameMaxLength is returning by debugging step by step ? Please let me know if you need more help on this.

Nageshwar Rao · Answer

[Required(ErrorMessageResourceType = typeof(CampaignResource.VendorCampaign) ErrorMessageResourceName = TitleRequired)] [CustomValidation(typeof(VendorCampaignValidator) ValidateName)] [Display(Name = Title ResourceType = typeof(CampaignResource.VendorCampaign))] public string Title { get; set; } public class VendorCampaignValidator : ValidationAttribute { public static ValidationResult ValidateName(string campaignName) { ResourceManager rm = new ResourceManager(typeof(InQuest.Sax.Resources.VendorCampaign)); if (string.IsNullOrWhiteSpace(campaignName)) return new ValidationResult(rm.GetString(TitleRequired)); if (campaignName.Length { return ValidationResult.Success; } else { return new ValidationResult(rm.GetString(InvalidLengthTitle)); // return new ValidationResult(rm.GetString(Title should be at most 25 characters long)); } } } public class VendorCampaignSettings { static readonly int defaultMaxLength = 25; public static int NameMaxLength { get { int maxLength = 0; try { string configLength = ConfigurationManager.AppSettings.Get(VendorCampaignNameMaxLength); if (!string.IsNullOrWhiteSpace(configLength)) { Int32.TryParse(configLength out maxLength); } } catch { maxLength = defaultMaxLength; } return maxLength; } } } but still it is not working plz helip me out in ths Thanks

Tejas Trivedi · Answer

Hello Nageshwar StringLenth is an attribute and available out of box. it is the limitation you can not assign dynamic value to the attributes in general so it would not be possible to pass the value from the configuration file for this. As an alternative what you can do is create your own custom attribute and internally code to read it from configuration based on the property name or id which can be pass as a constant to the attribute. Hope this will help you out. Feel free to write me if more information is required. Please don't forget to mark as answer if this helps.