In Windows 8 Application development, we came across the “Value does not fall within the expected range.” exception in two scinarios.

Scenario 1: We have a CollectionViewSource defined in our XAML called sampleData

<CollectionViewSource x:name=”sampleData” />

The source of the CollectionViewSource is set using the following code

sampleData.Source=Utility.GetData(custId);

where we are getting the data from an asynchronous method, GetData in the Utility class.

public async static Task<List<Data>> GetData(string data)

{

………………………………

……………………………….

……………………………….

}

Solution:

Call the asynchronous method using await

sampleData.Source=await Utility.GetData(custId);

Scenario 2: Another scenario, where we used the following code

<CollectionViewSource x:name=”sampleData” />

sampleData.Source=await Utility.GetData(custId);

public async static Task<Data> GetData(string data)

{……………………………………………………………………….}

Solution:

CollectionViewSource requires a collection data source. In our sample, it returns an object of type Data.

public async static Task<List<Data>> GetData(string data)

{……………………………………………………………………….}