c# - 从 .aspx 获取数据到 jquery ajax

Question

我是 jquery 新手，我有一个问题:我有两个 .aspx 文件:其中一个包含脚本

<script type ="text/javascript">
    $(document).ready(function () {
        var schemaName = GetURLParameters('schemaName');
        var key = GetURLParameters('key');
        $.post("dataloader.aspx", {
            name: schemaName,
            key: key
        });
    });
</script>

将参数发送到其他页面“dataloader.aspx”。这是“dataloader.aspx.cs”代码:

protected void Page_Load(object sender, EventArgs e)
        {
            Response.ContentType = "application/json";
            var schemaName = Request.Form["name"];
            var key = Request.Form["key"];

            Loader loader = ConnectionManager.getLoader();
            Dictionary<string, string> name_value = new Dictionary<string, string>();
            if (!string.IsNullOrEmpty(schemaName))
            {
                var schema = loader.GetSchema(schemaName);
                var qcontext = new SimpleLoader.BOService.QueryContext();
                qcontext.InitQueryContext();

                var element = loader.GetObjectByKey(schema, key);
                var viselems = element._Schema.GetVisibleElems(); 
                var cardElems = viselems.Where(x => !(x is SchemaElemDetail)).ToList();

                foreach (var elem in cardElems)
                {
                    var value = (element.GetValue(elem.Name) ?? "").ToString();
                    if (!string.IsNullOrEmpty(value))
                    {
                        name_value.Add(elem.Name, value);
                    }
                }
                Response.Write(name_value);
                Response.Flush();
                Response.End();
            }

        }

如您所见，我正在向字典添加一些数据。我想通过 jQuery 将这本字典发送到“clientcard.aspx”客户端，但我不知道如何......你能帮我吗？我将非常感激。

Answer 1

一种方法是调用 dataloader.aspx 中的 webmethod。假设您的函数名称为 getNameValue，在您的 aspx 页面中，您将有一个如下所示的 webmethod:(您基本上将代码从 Page_Load 事件传输到此)

[System.Web.Services.WebMethod]
public static Dictionary<string, string> getNameValue(string name, string keyN) 
{
  var schemaName = name;
  var key = keyN;

  Loader loader = ConnectionManager.getLoader();
  Dictionary<string, string> name_value = new Dictionary<string, string>();
  if (!string.IsNullOrEmpty(schemaName))
  {
    var schema = loader.GetSchema(schemaName);
    var qcontext = new SimpleLoader.BOService.QueryContext();
    qcontext.InitQueryContext();

    var element = loader.GetObjectByKey(schema, key);
    var viselems = element._Schema.GetVisibleElems(); 
    var cardElems = viselems.Where(x => !(x is SchemaElemDetail)).ToList();

    foreach (var elem in cardElems)
    {
      var value = (element.GetValue(elem.Name) ?? "").ToString();
      if (!string.IsNullOrEmpty(value))
      {
         name_value.Add(elem.Name, value);
      }
    }    
  }
  return name_value; //will be automatically serialised to JSON because of the dataType specification in ajax call.
}

您可以在 jQuery 中的 ready 中调用此函数，如下所示:

  $(document).ready(function () {
        var schemaName = GetURLParameters('schemaName');
        var key = GetURLParameters('key');
        //just in case
        var data = JSON.stringify({
            name: schemaName,
            keyN: key
        });

        $.ajax({
            type: "POST",
            url: "dataloader.aspx/getNameValue",
            data: data,
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            error: function (xhr, status, error) {
                var msg = JSON.parse(xhr.responseText);
                alert(msg.Message);
            }
          }).done(function (msg) {
            //msg.d will contain your dictionary
          });
  });

使用这种方法更好的原因是代码变得可重用。在当前设置中，如果您想获取 name_value 字典，则必须重新加载 aspx 页面。现在您需要做的就是调用这个方法。

希望这有帮助!