It can be handy to generate an active filtering link in a dataset. For example, we use a URL property to turn the values in the species column into links to a filtered subset of the data. When you click one species value, you get a grid showing only subjects of the same species. Another way to use a URL property in a list is to link to an outside file.
Create Links to Filtered Results
- Click the Start Page tab.
- From the Lists web part, click NIMHDemographics to open the grid view of the list.
- Click the column header Species, then Filter.
- Click the label Rat to select only that single value.
- Click OK.
- Notice the URL in your browser, which might look something like this - full path will vary, but the filter you applied is encoded at the end. This will show only rows where the species is Rat.
- Click Design.
- Click Edit Design.
- Select the Species field by clicking in its Name box.
- On the Display tab in the field properties box, enter this value for the URL field:
/list/grid.view?name=NIMHDemographics&query.Species~eq=${Species}
- The filter portion of this URL replaces "Rat" with the substitution string "${Species}". (If we were to specify "Rat", clicking any species link in the list would filter the list to only show the rats!)
- Scroll up and click Save.
- Click Done.
- Clear the filter by hovering over Filter: (Species = Rat) and then clicking Clear All.
- Click Field mouse and you will see the demographics list filtered to display only rows for field mice.
Create Links to Files
A column value can also include link to a file. All the values in a column could link to a fixed file (such as to a protocol document) or you can make row-specific links to files where a portion of the filename matches a value in the row such as the Subject ID in this example. Open this link in a new browser window:
Edit the URL, incrementing the file name 20023.png, 20024.png, 20025.png. These are simply cartoon images of our sample characters stored on a public server, but in actual use you might have slide images or other files of interest stored on your local machine and named by subjectId.
Here is a generalized version, using substitution syntax for the URL property, that you can use in the list design:
This generalized version is already included in the list design in our example archive.
- Click Start Page, then click the NIMHDemographics list in the Lists web part.
- Click Design.
- Click Edit Design.
- Select the CartoonAvailable field by clicking its Name box.
- Notice the URL property for this field. It is the generalized version of the link above.
- Click Cancel and return to the grid for this list.
- Observe that clicking true in the CartoonAvailable column opens an image of the 'subject' in that row.
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