Fail to InsertAsync() into azure database

Question

I have a problem during inserting data from a mobile app into an azure database.

My table in the database is defined like that:

This line couse an error:

        await usersTable.InsertAsync(
            new User
            {
                FirstName = this.FirstNameTextBox.Text,
                LastName = this.LastNameTextBox.Text,
                DepartmentID = 0,
                LiveID = App.MobileService.CurrentUser.UserId,
                Level = 0,
                Pluses = 0,
                Minuses = 0,
            });

Error message:

An exception of type 'System.ArgumentException' occurred in mscorlib.dll but was not handled in user code Additional information: Cannot insert if the id member is already set. If there is a handler for this exception, the program may be safely continued.

And here is a definition of a User class:

class User
{
    [JsonProperty(PropertyName = "ID")]
    public string LiveID { get; set; }

    [JsonProperty(PropertyName = "FirstName")]
    public string FirstName { get; set; }

    [JsonProperty(PropertyName = "LastName")]
    public string LastName { get; set; }

    [JsonProperty(PropertyName = "DepartmentID")]
    public int DepartmentID { get; set; }

    [JsonProperty(PropertyName = "Level")]
    public int Level { get; set; }

    [JsonProperty(PropertyName = "Pluses")]
    public int Pluses { get; set; }

    [JsonProperty(PropertyName = "Minuses")]
    public int Minuses { get; set; }
}

Answer 1

我遇到了类似的问题，在我的情况下，在调试过程中，我发现我正在插入具有相同唯一标识符的条目，您可以尝试这个方向，并在插入之前检查是否重复。