Ado.net sqlparameter null

There for if you want to pass a null value to your database the following code will throw an exception, saying the parameterized query was expecting a value for NullableId which was not provided.

NET Nothing is not the same as a database null. BeginTransaction ; command. Clear ; command. AddWithValue " NullableId " , null ; command. ExecuteNonQuery ; trans. Dispose ; trans. Value; else param. It would make our code a lot more cleaner and more readable. Share this: Twitter Facebook.

Like this: Like Loading NET , C. Leave a Reply Cancel reply Enter your comment here This answer is really nice because it examples in every way possible. I like the first approach, I usually use EF but in this requirement could not do it and it saves me a lot of time. Value ;. Adrian Adrian 6, 5 5 gold badges 26 26 silver badges 26 26 bronze badges. You can also cast AgeItem.

AgeIndex to an object: object AgeItem. But yea also prefer your approach — Jordec. So you could fix it by casting one of both to System. Object : planIndexParameter. Value : object AgeItem. GetUnderlyingType t! Equals default T , val ; else if t. Tim Schmelter Tim Schmelter k 64 64 gold badges silver badges bronze badges.

But if the value is DBNull. Value , ADO. Try this: if AgeItem. Flipster Flipster 4, 4 4 gold badges 27 27 silver badges 35 35 bronze badges. But now, you're just omitting a parameter - I highly doubt the stored procedure will be happy about this Happens all the time.

The client can either accept the default, or override it by passing the parameter. Why the downvote? Kanwar Singh Kanwar Singh 12 12 silver badges 20 20 bronze badges.

Rugmangathan 3, 6 6 gold badges 33 33 silver badges 44 44 bronze badges. Anil Kumar Anil Kumar 11 2 2 bronze badges. Add parameterName, sqlDbType. Mark Mark 10 10 silver badges 17 17 bronze badges. I use a simple method with a null check. Zhi An Zhi An 21 3 3 bronze badges. Is that conditional logic backwards? Should DBNull. Value be in the first one? Surely is. Rows created using NewRow or similar methods are assigned the DataColumn's default value.

The IsNull method returns true for both DbNull. Value and INullable. When comparing null values, it is important to understand the difference between the way the Equals method evaluates null values in System. SqlTypes as compared with the way it works with CLR types.

All of the System. SqlTypes Equals methods use database semantics for evaluating null values: if either or both of the values is null, the comparison yields null.

SqlTypes will yield true if both are null. This reflects the difference between using an instance method such as the CLR String. The following example demonstrates the difference in results between the SqlString. Equals method and the String. Equals method when each is passed a pair of null values and then a pair of empty strings. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info.

Contents Exit focus mode. Is this page helpful? Download Microsoft Edge More info. Contents Exit focus mode. Sql Parameter. Is Nullable Property Reference Is this page helpful? Please rate your experience Yes No.