Reads data frm config file

Nageshwar Rao

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 value,what value i am giving in config that value should take .How can do by using custom Attribute,plz gve sample code

3 Replies

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Tejas Trivedi10y ago
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 Rao10y ago
[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 <= VendorCampaignSettings.NameMaxLength)
{
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 Trivedi10y ago
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.