how to set Dynamic add content in Compression type in copy activity

I created the dynamic dataset and linker service. In copy activity i used that dynamic dataset and want to pass parameter in copy activity or use Compression type option as parameter/Dynamic, when i click on Compression type there is drop down menu and found option of add dynamic add content, but unable how to add or use this option .

I implement the answer in azure and found some issue , can you please have a look.

first i created two parameters

After parameters i edit the json as well, you can review it

and pass the parameter as string

But the. main issue is that i am unable to get these parameters into datasets You can check this picture.

This behavior might be a bug in the datasets of ADF. You can achieve your requirement by changing the dataset JSON as shown below.

First create the required dataset parameters.

Now, go to the dataset JSON by clicking on the icon {} at the top right corner of the dataset and edit the JSON to add the dynamic content expression.

Here, I have used Binary dataset, and I have edited the dataset JSON as shown below.

{
    "name": "Binary_source_compression",
    "properties": {
        "linkedServiceName": {
            "referenceName": "ADLS_nov20th_test",
            "type": "LinkedServiceReference"
        },
        "parameters": {
            "comp_type": {
                "type": "string"
            },
            "comp_level": {
                "type": "string"
            }
        },
        "annotations": [],
        "type": "Binary",
        "typeProperties": {
            "location": {
                "type": "AzureBlobFSLocation",
                "fileName": "mainzip.zip",
                "fileSystem": "zipsinputcon"
            },
            "compression": {
                "type": {
                    "value": "@dataset().comp_type",
                    "type": "Expression"
                },
                "level": {
                    "value": "@dataset().comp_level",
                    "type": "Expression"
                }
            }
        }
    }
}

Click on ok and now it will show the dynamic expression for these properties at the dataset level.

Give the required values to these parameters in the copy activity.

Run the pipeline and it will give the desired results.

UPDATE:

For the csv file, you can edit the dataset JSON as below.

        "compressionCodec": {
                "value": "@dataset().comp",
                "type": "Expression"
            },
            "compressionLevel": {
                "value": "@dataset().comp_level",
                "type": "Expression"
            }