Question

我想在“选择器”中添加一个自定义文本。我有一个选择器，可以从我的数据库中绑定 ItemsSource 和 ItemDisplayBinding ，如何将自定义文本添加到 ItemDisplayBinding 我想将零售商代码与 PresStreet 混合并格式化为“零售商代码-街道” ，我的表格在下面供参考

Picker标题=“选择零售商代码” x：Name =“ codePicker” SelectedIndexChanged =“ codePicker_SelectedIndexChanged” ItemsSource =“ {Binding RetailerCode}” ItemDisplayBinding =“ {Binding RetailerCode}” StyleClass =“ fieldForm” IsEnabled =“ False” < / p>

下面的代码是如何从数据库中获取数据并将数据添加到选择器中

var db = DependencyService.Get<ISQLiteDB>();
var conn = db.GetConnection();

var getCode = conn.QueryAsync<RetailerGroupTable>("SELECT * FROM tblRetailerGroup WHERE ContactID=?", item.ContactID);
var resultCount = getCode.Result.Count;
if (resultCount > 0)
{
   var result = getCode.Result;
   codePicker.ItemsSource = result;
   codePicker.IsEnabled = true;
}
else
{
   lstName.IsVisible = false;
   codePicker.IsEnabled = false;
}

我的零售商组表：

 [Table("tblRetailerGroup")]
public class RetailerGroupTable
{
    [PrimaryKey, MaxLength(100)]
    public string RetailerCode { get; set; }
    public int ContactID { get; set; }
    [MaxLength(300)]
    public string PresStreet { get; set; }
    [MaxLength(90)]
    public string PresBarangay { get; set; }
    [MaxLength(90)]
    public string PresDistrict { get; set; }
    [MaxLength(90)]
    public string PresTown { get; set; }
    [MaxLength(90)]
    public string PresProvince { get; set; }
    [MaxLength(90)]
    public string PresCountry { get; set; }
    [MaxLength(30)]
    public string Telephone1 { get; set; }
    [MaxLength(30)]
    public string Telephone2 { get; set; }
    [MaxLength(20)]
    public string Mobile { get; set; }
    [MaxLength(50)]
    public string Email { get; set; }
    [MaxLength(200)]
    public string GPSCoordinates { get; set; }
    [MaxLength(100)]
    public string Coordinator { get; set; }
    public DateTime LastSync { get; set; }
    public DateTime ServerUpdate { get; set; }
    public DateTime MobileUpdate { get; set; }
}

Answer 1

向您的类RetailerGroupTable添加只读属性

taskService.createTaskQuery().processDefinitionKey( your process definition key);

然后绑定到它

public string DisplayText {
  get {
    return $"{RetailerCode} - {PresStreet}";
  }
}

如何在Xamarin表单中将自定义文本添加到Picker的ItemDisplayBinding

1 个答案: