Question

我正在尝试在Web表单页面中显示telerik下拉列表，其中包含以下代码

private void LoadCustomerControl()
   {
       try
       {
           IControlPanelPersistenceProvider persistenceProvider = new ControlPanelDatabaseProvider();
           List<CustomerDataGrid> customerCollection = persistenceProvider.ListCustomerGrid(false);
           if (customerCollection != null && customerCollection.Count != 0)
           {
               cboCustomer.DataSource = null;
               cboCustomer.DataSource = customerCollection;
               cboCustomer.DataBind();
           }
           else
           {
               //TODO add here message
               m_btnSubbmit.Visible = false;
               m_btnModifyCustomer.Visible = false;
           }
       }
       catch (Exception ex)
       {

           string excep = ex.ToString();
           //TODO add log here
       }
   }

事实是，我得到的列表非常大，然后在浏览器中引发此错误

异常消息：序列化或反序列化期间出错 JSON JavaScriptSerializer。字符串的长度超过了在maxJsonLength属性上设置的值。

我试图添加到网络配置

<configuration>
  <system.web.extensions>
    <scripting>
      <webServices>
        <jsonSerialization maxJsonLength="2147483644 "/>
      </webServices>
    </scripting>
  </system.web.extensions>
</configuration>

我还尝试新建一个javascriptserializer，并将其maxjsonlength设置为Int32.MaxLength，序列化数据源，然后反序列化回CustomerDataGrid列表但不起作用。

对LoadCustomerControl的调用是通过

完成的

if (Request.QueryString.Get("customerId") != null && Request.QueryString.Get("customerId").Length > 0)
           {
               //Is comming from CustomerPage, display the customer
               LoadCustomerControl();
               cboCustomer.SelectedValue = Request.QueryString.Get("customerId");
               cboCustomer.Text = GetCustomerName(int.Parse(Request.QueryString.Get("customerId").ToString()));
               m_btnModifyCustomer.Visible = true;
           }
}

谢谢，

Answer 1

尝试在appsettings中添加以下内容＆LT; add key =“aspnet：MaxJsonDeserializerMembers”value =“2147483644”/＆gt;

在asp.net网络表单上，Json字符串长度超过最大值

1 个答案: