Tuesday, February 14, 2012

Creating Custom code with DBNull and Report Parameters

How can I force report parameter to accept a null value. I tried using the check box for null values to no avail. I am creating a custom code to get around this problem. I used the simple IIf statement below:

=IIF (Parameters!MarketID.Value = "None", IsDBNull.Value, Parameters!MarketID.Value)

...I was getting an error message like this:

The value expression for the report parameter ‘MarketID’ contains an error: [BC30455] Argument not specified for parameter 'value' of 'Public Shared Function IsDBNull(value As Object) As Boolean'.

How can I frame the IIf statement?

Thx in advance

You could try replacing IsDBNull.Value with System.DBNull.Value

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