Question

我们有一个可以嵌套在某个页面中的小部件。在小部件中，我们使用MVC控制器，我们通过以下方式调用Web服务：

public JsonpResult GetAllCities()
{
    List<string> allCities = MobileServiceClient.GetAllCities().ToList();
    return Jsonp(allCities);
}

如您所见，我们返回JsonpResult。

该服务如下所示：

[WebMethod]
[ScriptMethod(UseHttpGet = true, ResponseFormat = ResponseFormat.Json)]
public List<string> GetAllCities()
{
    var connection = ConnectionManager.Instance.CreateConnection();
    var sql = string.Format("select distinct CityName from V_Cashdesk where CityName is not null");
    var table = DB.GetSQLCached(sql, connection, 5);
    var lstCities = new List<string>();
    if (table != null)
    {
        for (var i = 0; i < table.Rows.Count; i++)
        {
            if (table.Rows[i]["CityName"].ToString() != "")
            {
                lstCities.Add(table.Rows[i]["CityName"].ToString());
            }
        }
    }

    return lstCities;
}

但是，当我们调用控制器的GetAllCities方法时，对话框中会出现“parseerror”。

错误是：

Failed to load resource: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'site_name' is therefore not allowed access.

XMLHttpRequest cannot load site_name/widget/Search/GetAllCities. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'site_name' is therefore not allowed access.

我们怎样摆脱这个？

ASP.NET：小部件中出现“parseerror”错误

0 个答案: