I created a test page based on your information.

The issue is not persisted using my test page. Please made any necessary changes to the attached test page and send back to us for further investigation.

Thank you for submitting your issue in our community forum. However, WebCombo 2.0 was discontinued for quite sometime. I’d recommend you to upgrade to WebCombo 4 as it includes many new features and fixes over the previous version. You might want to evaluate the 30-day trial of WebCombo 4 from the following link, http://www.intersoftpt.com/RequestTrial.aspx.

I will try to do my best to assist you to solve the issue.

Please try to set the additional filter of WebCombo 2.0 by using following syntax.
Wc_setAdditionalFilters(‘WebCombo instance ID’, “[Column name] = “ + the additional filter value);

For example, if there are two WebCombo, product WebCombo and category WebCombo. Product WebCombo is a WebCombo that shows list of products from Product table of Northwind database. And Category WebCombo is a WebCombo that shows list of categories from Categories table of Northwind database. The product WebCombo is filtered based on certain category selected in the category WebCombo. Please try to use following code.

wc_setAdditionalFilters( 'wcbProducts', "[CategoryID] = " + wc_States['wcbCategories'].Value );

For more detail, please download the sample from here.

Glad to hear that you’ve found a solution of your problem and share it with us.

Thank you very much for your contribution in our community forum. Should you find any other questions, suggestions, or problems regarding our products, please feel free to post them in our forum.

Thank you for your feedback. I have forwarded it to WebScheduler development team. They will check the feasibility to implement this feature.

I’ll keep you updated with any news I heard from the team regarding this issue.

WebGrid 7 provides nine column types, such as: "Button"; “ButtonImage”; “CheckBox”; “Custom”; “Hyperlink”; “Image”
"ImageAndText"; "Template"; and "Text".

Below is the description for each column types.

The most suitable column type for your scenario is "Image" column type. Simply set the ColumnType property to "Image" and set the CellImage property to point to your static image file. Example:

<ISWebGrid:WebGridColumn Bound="False" ColumnType="Image" CellImage="./images/Order-Details.gif"
    EditType="NoEdit" Name="Icon" Width="20px">
</ISWebGrid:WebGridColumn>

Please check the sample of image column type in our live sample at here. Expand the child of the hierarchical grid sample until "OrderDetails" table. The column on the left side of "OrderID" column is using image column type.

Hope this helps.