SSRS从数据集中获取列值

Question

I want to do something so simple that there is no reference to it on the internet!

I have a dataset that returns a singe row:

Col1   Col2   Col3  Col3...
abc    def    ghi   zzz...

I just want to display the value of Col2 (def) in a textbox. I don't want to SUM() anything. I don't want to AVG() anything.

How can I display the value of Col2 (def) in a textbox.

• Fields!Col1.Value throws an error
• Lookup() throws an error.

Answer 1

=First(Fields!Col2.Value, "DatasetName")

SSRS expects a dataset to be a set (or to put it another way, it expects multiple rows). A textbox is meant to hold a single value, so it doesn't know how to put multiple values in a single-value container. You have to use some sort of aggregate function to tell SSRS that this will only be one value; I recommend the First function for clarity.