Get data from view state to list (viewstate have table)

Question

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Suppose I have a data in a list like below and now I want to get data from viewstate which already contain table in that I want one column. How can I do that?

C#

public List<Employee> GetEmployeeList()
    {
        List<Employee> empList = new List<Employee>();
        empList.Add(new Employee() { ID = 1, Email = "Mary@somemail.com"});
        empList.Add(new Employee() { ID = 2, Email = "John@somemail.com"});
        empList.Add(new Employee() { ID = 3, Email = "Amber@somemail.com"});
            empList.Add(new Employee() { ID = 8, Email = "Jonay@somemail.com"});
        empList.Add(new Employee() { ID = 9, Email = "Robert@somemail.com"});
        empList.Add(new Employee() { ID = 10, Email = "Krishna@somemail.com" });
        return empList;
    }

Posted 15-May-11 23:28pm

praveen_gpk

Updated 16-May-11 1:40am

Sandeep Mewara

v2

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Hemant__Sharma · Answer 1 · 2011-05-15T23:52:00

Solution 1

If i'm getting your question right you have a datatable in the viewstate and you want to add all the values from rows of a particular column to the list you have shown above. if that is the case you can:

1- Get Datatable from viewstate. DataTable dataTable = ViewState["myDataTable"]
2- Get the list from GetEmployeeList(...). List<Employee> listEmployee = GetEmployeeList();

3- Iterate through rows of datatable and add values to your list variable.

for(rowIndex=0; rowIndex<datatable.rows.count;>{
string columnValue = dataTable.Rows[rowIndex]["email"];
Employee emp = new Employee(){ID=someID, Email=columnValue});
}

Hope it will help.
thanks,
Hemant

Posted 15-May-11 23:52pm

Hemant__Sharma

Comments

praveen_gpk 16-May-11 6:23am

may be you got my question but their is error that am not able to access viewstate over their Error,,check out the error The name 'ViewState' does not exist in the current context

Hemant__Sharma 16-May-11 6:37am

Where are you trying to access the ViewState object? you cannot access viewstate outside it's page's scope.
It seems you have a .aspx page and a helper class where you have written GetEmployeeList and you are trying to access ViewState object outside the page. if that is the case you can fetch the datatable in your page itself and then send to GetEmployeeList(...) function or some target function as input patameter.

Thanks,
Hemant

praveen_gpk 16-May-11 10:53am

ok i got the solution have to use page inherit web.ui.page