Json string length exceeds maximum on asp.net web forms

Question

I'm trying to display a telerik dropdownlist in a web forms page, with the following code

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
       }
   }

Thing is that the list I'm getting is very big and then it raises this error in the browser

Exception message: Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property.

I have tried to add to the web config

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

I also tried to new up a javascriptserializer and set it's maxjsonlength to Int32.MaxLength, serialize the datasource and then deserialize back to the List of CustomerDataGrid but none work.

The call to that LoadCustomerControl is done via

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;
           }
}

Thanks,

score 0 · Answer 1 · answered Apr 07 '16 at 17:39

0

Try adding following to the appsettings < add key="aspnet:MaxJsonDeserializerMembers" value="2147483644" />

answered Apr 07 '16 at 17:39

Anil Goel

261
1
8

Forgot to mention that tried that as well, same luck – mitomed Apr 07 '16 at 17:43
Look at this stackoverflow thread. Might help. http://stackoverflow.com/questions/9509721/jsonvalueproviderfactory-throws-request-too-large – Anil Goel Apr 07 '16 at 17:49
Thanks a lot, saw it before asking. Spent hours on this already but nothing seems to fix it. – mitomed Apr 07 '16 at 17:51
1

I also read somewhere that you may need to set – Anil Goel Apr 07 '16 at 18:01

Json string length exceeds maximum on asp.net web forms

1 Answers1