Combo Box cant multi selected

Hi Expert, Recently, I 'm developing multi select function, I refer to the Combobox widget to achieve the function. However, the function only can select one item. I'm not sure if any wrong on setting or not . Can you give me a direction for this? Thanks a lot. I expect it should be like below :(  
1 answers

Hi Andy,


Is your accociation you use for the datasource a reference set? It needs to be a M:M association to support your required behavior. 


For more detailed info please refer to the documentation: