I am receiving long string of checked html checkbox values (Request.Form["mylist"] return Value1,Value2,Value3....) on the form post in ASP.NET 2.0 page.
Now I simply want to loop these but I don't know what is the best practice to loop this array of string. I am trying to do something like this:
foreach (string Item in Request.Form["mylist"]){
Response.Write(Request.Form["mylist"][Item] + "<hr>");
}
But it does not work.
You have to split the comma separated string. Try
string myList = Request.Form["myList"];
if(string.isNullOrEmpty(myList))
{
Response.Write("Nothing selected.");
return;
}
foreach (string Item in myList.split(new char[] {','}, StringSplitOptions.RemoveEmptyEntries))
{
Response.Write(item + "<hr>");
}
I recommend to do not use Split in Form values to prevent splitting values with commas.
string myList = Request.Form.GetValues("myList");
foreach (var Item in myList)
{
Response.Write(item + "<hr>");
}
To complete and debug DolceVita's answer, which has an important and correct point...
Given the following example HTML
<p>Select numbers for a sum:</p>
<input type="checkbox" id="c1" name="myList" value="1"/><label for="c1">1</label>
<input type="checkbox" id="c2" name="myList" value="2"/><label for="c2">2</label>
<input type="checkbox" id="c3" name="myList" value="3"/><label for="c3">3</label>
you can read selected checkboxes by
var sum = 0;
var selectedNumbers = Request.Form.GetValues("myList");
if (selectedNumbers != null)
{
foreach (var selectedNumber in selectedNumbers)
{
// my example uses integers
var number = int.Parse(selectedNumber);
sum += number;
}
}
Response.Write("<p>Sum: " + sum + "</p>");
