如何将默认的constrint值以及manuall更新值设置为linq to sql？ [英] How to set default constrint value as well as manuall update value to linq to sql ?

问题描述

Hii，



之前我有桌子，我设置了一个默认的constrint到我的一个专栏。



所以，如果没有在linq类中提供，那么默认设置为null，即使我在sql表中将我的默认值设置为4，



然后我从dbml中设置该列的属性，将auto autorate设置为true ..它正在工作..



now问题是..从其他方法，当我尝试为该列提供一些其他价值...





它投掷了错误..



由数据库计算或生成的成员无法更改。



i want在不提供时使用默认值，并且在提供时我的值应该更新

Hii,

Previously i had table and i set a default constrint to one of my column .

so , if not provided in linq class , then null was setting by default even though i set my default value to 4 in sql table,

Then i chnaged the property of that column from dbml , Set autogenrate to true .. and it was working..

now the problem is .. from other method when i try to give some other value for that column ...


it is throwing an error ..

A member that is computed or generated by the database cannot be changed.

i want to use default value when not prvided and my value when procvided it should get updated

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