Need Help cannot convert from 'string' to 'int?'

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so i have stored procedure Update that has some values and i am using it

C#

fa.Update_Person(Convert.ToInt32(e.Keys["ID"]),e.NewValues["FIRST_NAME"].ToString(), e.NewValues["LAST_NAME"].ToString(), e.NewValues["Alt_Firstname"].ToString(), e.NewValues["Alt_Surname"].ToString(), e.NewValues["PHONE_WORK"].ToString(), e.NewValues["PHONE_HOME"].ToString(), e.NewValues["MOBILE"].ToString(), e.NewValues["FAX"].ToString(), e.NewValues["EMAIL"].ToString(), DateTime.Now, e.NewValues["Note"].ToString(), DateTime.Now,e.NewValues["Position"].ToString(),Convert.ToInt32(e.NewValues["Company_ID"]), Convert.ToInt32(e.NewValues["Country_id"]),Convert.ToInt32(e.NewValues["City_id"]),e.NewValues["State"].ToString(), e.NewValues["Adress"].ToString(), e.NewValues["Zip_Code"].ToString(), Convert.ToInt16(e.NewValues["Group_Id"]));

like this City-Id is INt and Position is String but i get error on 2 of this that

C#

cannot convert from 'string' to 'int?'

can you help me out?

Posted 27-Dec-15 20:51pm

GTR0123

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Michael_Davies 28-Dec-15 2:56am

What value is in City_id?

GTR0123 28-Dec-15 2:57am

only int values

Michael_Davies 28-Dec-15 3:02am

Okay, however convert.toint32 works so long as the input is numeric.

Before you execute the update look at the value in City_id and all the other values you are converting to int32 one of them must have a wrong value, maybe Null, to cause the error.

GTR0123 28-Dec-15 3:12am

i debuged but there is nothig it is erroring me without debug if i change city_id to convert int32 it is erroring instantly but when i make it tostring() it not erroring..... if city_id is tostring() it going on Catch buuut Update command is working it is updating

Hemant Singh Rautela 28-Dec-15 8:04am

just show us Update_Person code ! & your input values also for this fuction....

& stored procedure code

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CPallini · Answer 1 · 2015-12-27T21:02:00

Solution 1

You have to use the debugger, you know.
Either City_id is actually meant to be a descriptive string (e.g. "N.Y.") so there is logical error in your program or it should have been the string representation of a number (a bad practice, anyway) but was badly filled (e.g. "124W").

Posted 27-Dec-15 21:02pm

CPallini