ComboBox Dynamic Binding Assignment in C #

http://www.crifan.com/csharp_combobox_data_dynamic_binding/

In C #, there is already a list that wants to be dynamic and bound to a ComboBox.

"Resolution Process"

1. Reference:

C # WinForm ComboBox dynamic binding Data

To try the code:

Cmbsubcategory.datasource = generalcategorylist;
Cmbsubcategory.displaymember = "name";
cmbsubcategory.valuemember = "url";
The result is executable, but when you click on the ComboBox, the down menu is empty.

2. Reference:

C # Binding Generic list<string> to Combo Box

Going to try.

3. After the toss, find the reason:

"Understood" code in C # adds a breakpoint, but it cannot be executed when debugging.

4. Then here, in fact, the previous notation is normal:

public struct Categoryitem
{
public string Name {get; set;}
public string Url {get; set;}
};
List<categoryitem> generalcategorylist;

private void Initsearchcategory ()
{
Generalcategorylist = new list<categoryitem> ();

foreach (Htmlnode singleoptionnode in optionnodelist)
{
......

Store Info
Categoryitem Singlecategoryitem = new Categoryitem ();
Singlecategoryitem.name = generalcategory;
Singlecategoryitem.url = Singlecategoryurl;
Add to List
Generalcategorylist.add (Singlecategoryitem);
}

if (Generalcategorylist.count > 0)
{
Init search Category
Cmbsubcategory.datasource = generalcategorylist;
Cmbsubcategory.displaymember = "name";
cmbsubcategory.valuemember = "url";
}
}
You can then see the corresponding options in the ComboBox:

Summary

The binding action, in fact, is simple:

Cmbsubcategory.datasource = generalcategorylist;
Cmbsubcategory.displaymember = "name";
cmbsubcategory.valuemember = "url";
You can do it.

But be aware that:

Here, if you change to:

public struct Categoryitem
{
public string name;
public string URL;
};
List<categoryitem> generalcategorylist;

private void Initsearchcategory ()
{
Generalcategorylist = new list<categoryitem> ();

foreach (Htmlnode singleoptionnode in optionnodelist)
{
......

Store Info
Singlecategoryitem.name = generalcategory;
Singlecategoryitem.url = Singlecategoryurl;
Add to List
Generalcategorylist.add (Singlecategoryitem);
}

if (Generalcategorylist.count > 0)
{
Init search Category
Cmbsubcategory.datasource = generalcategorylist;
Cmbsubcategory.displaymember = "name";
cmbsubcategory.valuemember = "url";
}
}
Then the result is wrong, and then each item is the name of the corresponding object:

The specific root cause, temporarily lazy to delve into.

ComboBox Dynamic Binding Assignment in C #