I have a Product table with non-null \"quantity\" (decimal) and \"status\" (int) columns, and I created a view on this table wi开发者_Go百科th the following case expression:
I am using a gridview in my asp.net project to view and modify some records from the database. The database has two columns: start_date and end_date. When a new record is created these columns contain
I want to create a function (c开发者_开发知识库#): int PutInt (int? x) { if (x.HasValue) return x.Value;
I\'ve begun using Massive, by Rob Conery. Awesome lit开发者_如何学Gotle \"ORM\" and very performant. However, I\'m running into issues with System.DBNull comparisons on my nullable fields.
I want to return all rows from a SQL Server 2008 database table into开发者_开发知识库 a SQL data source if a textBox field is blank. So I made a stored procedure with an if @date IS NULL clause.
I need to parse a value from a DataRow and assign it to another DataRow. If the input is valid, then I need to parse it to a double, or else add开发者_如何学JAVA a DBNull value to the output. I\'m usi
I have an aspx page which allows a user to submit modified entries into the database, but when the user clicks Submit to fire the stored procedure I want to first run a check to see if a modified row
I guess it is too late and I\'m too tired to see what I\'m doing wrong. Here is what I\'m trying: int imageId = imageDal.AddImage(new SqlParameter[]
im getting a value from the database. it came out an error saying \"Conversion from DBNULL to Double is not Valid.\" anyone, pls help me?
I\'m loving MVC but unfortunately all the tutorials, demos and ALL resources use Entity Framework to generate ViewData and most use LINQ to SQL instead of DataSets.
加载中,请稍侯......