dbnull

相关标签：javascript jquery android 多少钱 iPhone

SQL view infers nullable column from non-null table?

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:[详细]

2023-03-06 18:51 分类：问答
Two way binding with custom 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[详细]

2023-03-05 05:44 分类：问答
C# : return dbnull.value or system.type from function?

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;[详细]

2023-03-03 13:50 分类：问答
How does one reliably check if a nullable property contains no data? DBNull is killing me

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.[详细]

2023-02-23 00:16 分类：问答
Passing blank field value to stored procedure ASP .NET C#

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.[详细]

2023-02-12 04:11 分类：问答
How can I assign a DBNull in a better way?

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[详细]

2023-02-12 02:45 分类：问答
How do I check a datareader for null?

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[详细]

2023-02-10 07:40 分类：问答
Getting SCOPE_IDENTITY from SQL Server on Insert

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[][详细]

2023-02-08 18:26 分类：问答
How to convert a DBNULL to double?

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?[详细]

2023-02-06 06:16 分类：问答
Having trouble dealing with completely legit DBNULL. Using DataSets DataTables being passed as the Model data Views. ASP.NET MVC2

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.[详细]

2023-02-05 11:22 分类：问答