GetValue

Function returns the ITag value or null if it is not an ITag.

Syntax:

Object GetValue(string tagName);

Params:

String tagName: a string parameter that contains the tag name.

Return:

Object: value of the tag passed as parameter;

Example: Filtering tags and getting their values using SVTags.

In this example, we will need to create the following scenario:

. Create 10 tags with their default type as integer:

. Create a graphic with 1 button as in the image below:

. Now let's configure the button with the following code:

Dictionary<string, List<string>> filters = new Dictionary<string, List<string>>();

List<string> lsF = new List<string>();

lsF.Add("1");

lsF.Add("2");

lsF.Add("3");

lsF.Add("4");

lsF.Add("5");

filters.Add("NewTag", lsF);

List<string> lstreturn = SVTags.Filter(filters, true);

SVApplications.Output("Found " + lstreturn.Count.ToString() + " ocurrences");

foreach(string str in lstreturn)

{

object objVal = SVTags.GetValue(str);

int tagVal = (int)objVal;

SVApplications.Output("Value read from tag " + str + " = " + tagVal.ToString());

}

. We are creating a dictionary and adding to it a filter where all the tags with the *NewTag* text on the name must have value from 1 to 5. The result will be written to the output log. We also use the SVTags.GetValue function to return the tag's value.

. Now let's run a test.

. Run the Application (F5) and see the results.

. Open the Data Watcher.

. Add the 10 tags to the data watcher as in the image below:

. Also define values to NewTag2, NewTag4, NewTag6, NewTag8, NewTag10 (from 1 to 5). These tags will be the ones filtered.

. Open your graphic and click the "Check" button.

. The result will be written to the output log.

. As you can see, the Filter function returned the tags correctly. Then we used the GetValue function to check their values.