Dynamically Create instance for class

hisanth nithi

Hi i have 2 class (YarnBLL, DyingBLL) with same property.

i need to create a instace based on switch case

Here i have an error in

var obj;

it shows

Error 1 Implicitly-typed local variables must be initialized

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Mageshwaran R6y ago
Hi,
Please refer the below link, it might helps you
https://stackoverflow.com/questions/34701795/dynamically-create-instances-of-c-sharp-class/34701819
0
Jaish Mathews7y ago
You should refer Factory design pattern here.
+1
Mario Scheeren7y ago
Hi, make them both inherit from an interface consoting of those properties / methods.
public interface IBaseInterface
{
    DateTime InDate { get; set; }
    string CategoryName { get; set; }
    void Save();
}

public class YarnBLL : IBaseInterface
{
    public DateTime InDate { get; set; }
    public string CategoryName { get; set; }

    public void Save()
    {
    }
}

public class DyingBLL : IBaseInterface
{
    public DateTime InDate { get; set; }
    public string CategoryName { get; set; }

    public void Save()
    {
    }
}

public string insave(string name)
{
    IBaseInterface obj;
    switch (name)
    {
        case "YARN":
            obj = new YarnBLL();
            break;
        case "WEAVING":
            obj = new DyingBLL();
            break;
        default:
            break;
    }
    obj.InDate = Utils.ConvertStringToDate(txtDate.Text);
    obj.CategoryName = ddlCategory.SelectedItem.ToString();
    obj.Save();
}
You should try learn / understand OOP !
+1