System Profile
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“Looks like the allowed format for text and symbols has been changed for Radio Operator. All GOC expiry every 5 years and all ROC-M prior Jan 2005 have expired. Since there is no special box allotted for dates we have been told for many years now to record the dates beside name as { expiry DDMMYY}. When I entered expiry here the filed error and now is locked out from opening. Please repair and notify when complete.”
*You will need to have account “edit permissions” to reproduce the error. If you don’t see the edit icon (as per Problem #1, then enable the fix there.
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The record was saved as "RICHARD TREMBLAY {expiry?}" in the RD_OP1 data field, within the RIDMS_INSPECTION data table.
When later attempting to open the record for editing, the "injection" crashes RIDMS:
Server Error in '/Saf-Sec-Sur/4/RIDMS-SGDIR' Application.
Input string was not in a correct format…@Html.TextBoxFor(model => model.InspectionEditInfoViewModel.OperatorName1, Model.InspectionEditInfoViewModel.OperatorName1)
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For users, please try not to do multiple clicking during saving before this kind of protection.
Problem 6: Once added MaxLength or MinLength DataAnnotation in Model define, if there is @Html.ValidationMessageFor in view, it will pop up null value error.
The problem could be fix by in the DataAnnotation part, announcing the Error massage like:
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[MinLength(4, ErrorMessage = "The username must be at least 4 characters long.")]
Problem 7: result = _context.RIDMS_TABLE_RUNITS.Where(x => x.REPORTING_UNIT_ID == id && x.ACTIVE_FLAG == "A").Select(x => x.REPORTING_UNIT_DESC_E).Single(); returns "System.InvalidOperationException: 'Sequence contains no elements'"
The exception "System.InvalidOperationException: 'Sequence contains no elements'" is thrown when you try to call the Single() method on a sequence that contains no elements. In your case, the LINQ query you provided is attempting to retrieve a single element based on certain conditions, but it seems there are no elements in the result.
Solution:Use FirstOrDefault with Null Check: Consider using FirstOrDefault instead of Single. This way, if there are no matching elements, the result will be null, and you can check for it before trying to access its properties.
result = _context.RIDMS_TABLE_RUNITS .Where(x => x.REPORTING_UNIT_ID == id && x.ACTIVE_FLAG == "A") .Select(x => x.REPORTING_UNIT_DESC_E) .FirstOrDefault();
if (result != null){ // Your logic when a result is found}else{ // Handle the case when no matching element is found}