如何将列表绑定到DDL?

您所缺少的只是告诉下拉列表以文本形式显示GetBranch的哪些属性以及使用哪些属性作为值:

ddlOption.DataTextField = "propertyOfgetBranchToShowAsText";
ddlOption.DataValueField = "propertyOfgetBranchToUseAsValue";

好的,代码应该是这样的(我想):

分支类属性:

public int BranchValue {get;set;}
public string BranchText {get;set;}

…

public List<Branch> branchesToShow { get; private set; }
...                           
branchesToShow = getBranch(user.code); //get the list of branches
ddlOption.DataTextField = "BranchText"
ddlOption.DataValueField = "BranchValue";
ddlOption.DataSource = branchesToShow;                        
ddlOption.DataBind();