C How To Set Sql Datetime To Null From Linq Stack Overflow

C How To Set Sql Datetime To Null From Linq Stack Overflow What i tried is: 1) customer.dob = dtp dob.checked ? datetime.parse(dtp dob.value.tostring("yyyy mm dd")) : sqldatetime.null; but this will not succeed as sqldatetime cannot be converted to system.datetime. 2) datetime? nulldatetime = new datetime(); customer.dob = dtp dob.checked ? datetime.parse(dtp dob.value.tostring("yyyy mm dd. You can try this: datetime? dt = string.isnullorempty(date) ? (datetime?)null : datetime.parse(date); it is not clear how you save the data to the database, you can refer to the following to add dbnull.value. cmd.parameters.addwithvalue("@date", (object)dt ?? dbnull.value);.

C Linq To Sql Query Not Returning Correct Datetime Stack Overflow Datetime? nulldatetime = new datetime (); customer.dob = dtp dob.checked ? datetime.parse (dtp dob.value.tostring ("yyyy mm dd")) : nulldatetime.value. In this article, you'll learn about the basics of datetime object and how to utilize it in c# to assign a null value. Postit p = new postit(); . datetime? dt; if(textboxdate.text=="") dt=null; else. dt=system.convert.todatetime(textboxdate.text); gridview1.datasource = p.searchpostit(textboxmessage.text, textboxwriter.text, textboxmailto.text, system.convert.todatetime(dt)); . gridview1.databind(); @message varchar(1000)='', . @writer varchar(50)='',. When i try to modify the nullvalu property to go from " (throw exception)" to " (empty)" or " (null)", the designer gives this error: "the value entered is not valid for the current data type.".

C Compare Datetime Without Time On Linq Stack Overflow Postit p = new postit(); . datetime? dt; if(textboxdate.text=="") dt=null; else. dt=system.convert.todatetime(textboxdate.text); gridview1.datasource = p.searchpostit(textboxmessage.text, textboxwriter.text, textboxmailto.text, system.convert.todatetime(dt)); . gridview1.databind(); @message varchar(1000)='', . @writer varchar(50)='',. When i try to modify the nullvalu property to go from " (throw exception)" to " (empty)" or " (null)", the designer gives this error: "the value entered is not valid for the current data type.". Consider the following code in microsoft sql server 2012: select [field1] ,[field2] ,cast([datefield] as datetime) from [raw].staging. the staging table is loaded with data from a csv file. so in some cases, rather than having null fields we end up with empty fields. I have a linq query that is joining the tables and returning data as expected unless enddate is null. if the date field is null i get an error "cannot cast dbnull.value to type 'system.datetime'. please use a nullable type." i need all rows even if enddate is null. what is the best way to handle the null issue and get all rows of data?. I do not have a blank sql datetime field and if my text box is empty in the asp mvc app because it is not can convert string.empty t. What is the proper way to bind a nullable datetime attribute via linq parameters with database datetime field, which allows nulls. many thanks for your support. if a value obtained from the aspxdateedit equals 1.1.0001, you should replace it with the null value. you can do this within the aspxgridview.onrowupdating event handler:.