selected value option All clear after display value How to prevent thi

try this

    
        Select Status
        Pending Request
        All requests
    
    

thanks for support issue still exist 

it refresh page and after refresh go to first item

ful code 

    
        Select Status
Pending Request
All requests 
      
    
    
   

[HttpPost]
public async Task GetSelectedDropDownChanged() //Assuming key in your dropdown is string
{
    string selectedValue = Request.Form["statusselect"].ToString();

    List workforceRequest = new List();

    if (selectedValue == "1")
    {
        workforceRequest = Workforce.GetPendingOnPalnningSection(RoleKey.PLS);
    }
    if(selectedValue=="2")
    {    
        workforceRequest = Workforce.GetAllRequestsOnPalnningSection(RoleKey.PLS);
    }
    ViewBag.SelectedOption = selectedValue;

    return View(workforceRequest); 
}

from debug funtion it detect as viewbage have value 2 but it got first item 0 as select status

so how to solve this issue

If you don't have a property named SelectedOption in your existing model, you can create a separate class to hold the selected option value or can use the ViewBag, ViewData. So here an example using ViewBag.

    
        Pending Request
        All requests
    
    Submit

[HttpPost]
public async Task GetSelectedDropDownChanged(string statusselect)
{
    List workforceRequest = new List();
    if (statusselect == "1")
    {
        workforceRequest = Workforce.GetPendingOnPalnningSection(RoleKey.PLS);
    }
    else if (statusselect == "2")
    {
        workforceRequest = Workforce.GetAllRequestsOnPalnningSection(RoleKey.PLS);
    }

    // Store the selected option value in the ViewBag
    ViewBag.SelectedOption = statusselect;

    return View(workforceRequest);
}

thanks for support 

but Model.SelectedOption 

I don't have any property on Model name selectedoption

so what i do to add make that please 

I think the issue lies in the way the selected value is being handled in the controller. Currently, the selected value is not being passed back to the view after the form submission, which is causing the dropdown to revert to its default value upon displaying the result data. Check the below code this may help you:

    
        Pending Request
        All requests
    
    Submit

public async Task GetSelectedDropDownChanged(string statusselect)
{
    List workforceRequest = new List();
    if (statusselect == "1")
    {
        workforceRequest = Workforce.GetPendingOnPalnningSection(RoleKey.PLS);
    }
    else if (statusselect == "2")
    {
        workforceRequest = Workforce.GetAllRequestsOnPalnningSection(RoleKey.PLS);
    }

    // Pass the selected value back to the view
    var model = new YourModelClass
    {
        WorkforceRequests = workforceRequest,
        SelectedOption = statusselect
    };

    return View(model);
}