Question

How do I call a data set from a dictionary inside of a foreach loop? In the code below .Rows doesn’t exist and the dataset is null in the foreach loop.

public class dictWITHdataset
{
    public dictWITHdataset()
    {
        DataSets = new Dictionary<string, DataSet>();
    }

    public IDictionary<string, DataSet> DataSets { get; private set; }

    public DataSet readrows(DataSet dataset)
    {
        string query = "SELECT * FROM test.dbo.test";
        SqlDataAdapter adapter = new SqlDataAdapter();
        adapter.SelectCommand = new SqlCommand(query, conn);
        adapter.Fill(dataset);
        return dataset;
    }
}

I later try to call the dataset from a dictionary in a foreachloop but it claims Rows does exist and its null.

dictWITHdataset dict = new dictWITHdataset();
DataSet data = new DataSet();
dict.DataSets("Dictionary1",data) //not sure if correct way to call data set
foreach (System.Data.DataRow row in  dict.DataSets["Dictionary1"].Rows)
{
    @:row["id"] + " " + row["name"];
} 

Answer 1

You have forgot to call dict.readrows call, thus it only adds an empty dataset. Also, readrows does not need to take a parameter, you can create it in the function.

dictWITHdataset dict = new dictWITHdataset();
DataSet data = new DataSet();
dict.DataSets("Dictionary1",dict.readrows(data)) 
foreach (System.Data.DataRow row in  dict.DataSets["Dictionary1"].Rows)
{
    @:row["id"] + " " + row["name"];
}