Dropdownlist - Get Id of Selected Value

For getting the CategoryID you have to specify the name of your Category Dropdownlist, like as follows

ddlCategory.SelectedValue

You will get the value of your category and save it in database.

Thanks

Thank you all for Answers & Suggestions,

But, I also want to share one more Answer of my question, which I found at other Asp Forum, If any one also have to face that problem or beginner to Asp follow that Answer,

First Create a Method for filling DropDownList:

private void FillCatagoryList()
    {
        // Filling the Drop DownListItems //
        try
        {       
            // Using Connection String from web.config File //
            SqlConnection sqlcon = new SqlConnection (ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString); //    
            sqlcon.Open();
            DataSet ds = new DataSet();
            SqlCommand cmd = new SqlCommand("select * from catagories", sqlcon);
            SqlDataAdapter adapter = new SqlDataAdapter(cmd);
            adapter.Fill(ds);
            List_Catagories.DataSource = ds;
            List_Catagories.DataTextField = "cat_name";
            List_Catagories.DataValueField = "cat_id";
            List_Catagories.DataBind();
        }
        catch (Exception err)
        {
            lblResults.Text = "Error reading list of names. ";
            lblResults.Text += err.Message;
            // The Code below Shows the Alert Box
            // Response.Write("<script>alert('No Image Selected!')</script>");
        }
        finally
        {
            sqlcon.Close();
        }

Previous Code will save temprory both Category Id & Category Name, and shows Category Name in "DropDownList" from "List_Catagories.DataTextField" and save "Cat_id" in "List_Catagories.DataValueField".

Then Save the New Sub-Category Item(User Input) and its code(From DropDownList Selected Item) using the following code:

try
{
// Using Connection String from web.config File //
SqlConnection sqlcon = new SqlConnection (ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString); //    
sqlcon.Open();
string nam = txtSubCategory.Text.Trim();
int Sel_id = Convert.ToInt32(List_Catagories.SelectedValue);
SqlCommand cmd  = new SqlCommand("INSERT INTO catagories_sub (category_id, Category_Name) values ("+ Sel_id +", '"+ nam +"')", sqlcon);
cmd.ExecuteNonQuery();
}
catch (Exception err)
{
lblResults.Text = "Error reading list of names. ";
lblResults.Text += err.Message;
}
finally
{
sqlcon.Close();
}

So, That's the Solution, and it will save a Category id of Category table to the sub category, if we select through inner join, the result will give us the category and sub-category matched record, I am pasting my SQL Query so you can execute it easiy,

select cat_name, sub_name from category c inner join sub_category sc on c.cate_id = sc.cate_id

Thanks,
Regards,
Mustafa Iqbal.