C# implements ComboBox to automatically match characters

1. Use CustomSource as a prompt collection
Just add the following code to the window loading function. Assume that unitNameList is the string list you want to add to the drop-down list.

Copy the codeThe code is as follows:

 
AutoCompleteStringCollection collection = new AutoCompleteStringCollection(); 
// Get the unit list
List<string> unitNameList = (); 
foreach (string unitname in unitNameList) 
{ 
(unitname); 
//("Auto Prompt" + unitname);
} 
this. = collection; 
this. = ; 
this. = ; 

Among them, AutoCompleteMode includes four situations: None, Suggest, Append and SuggestAppend.
None: Turn off the automatic completion function
Suggest: Expand the drop-down list and display matching results
Append: Automatic completion
SuggestAppend: The combination of Suggest and Append, that is, the drop-down list is automatically completed.

2. Use items in the drop-down list directly as matching collections
AutoCompleteSource is set to ListItems.

Copy the codeThe code is as follows:

 
// Get the unit list
List<string> unitNameList = (); 
foreach (string unitname in unitNameList) 
{ 
this.(unitname); 
} 
this. = ; 