<?xml version="1.0"?>

<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->

<configuration>
    <connectionStrings>
        <add name="ubing.ir_regadmindataConnectionString" connectionString="Data Source=ubing.ir;Initial Catalog=ubing.ir_regadmindata;User ID=ubing.ir_regadmindata;Password=ali0"
            providerName="System.Data.SqlClient" />
        <add name="universityConnectionString" connectionString="Data Source=SADRTEAM;Initial Catalog=university;Integrated Security=True"
            providerName="System.Data.SqlClient" />
        <add name="ubing.ir_athuserConnectionString" connectionString="Data Source=ubing.ir;Initial Catalog=ubing.ir_athuser;User ID=ubing.ir_athuser;Password=alidath00"
            providerName="System.Data.SqlClient" />
        <add name="ubing.ir_athuserConnectionString2" connectionString="Data Source=ubing.ir;Initial Catalog=ubing.ir_athuser;User ID=ubing.ir_athuser;Password=aaath00"
            providerName="System.Data.SqlClient" />
        <add name="ubing.ir_athuserConnectionString3" connectionString="Data Source=ubing.ir;Initial Catalog=ubing.ir_athuser;User ID=ubing.ir_athuser;Password=adah00"
            providerName="System.Data.SqlClient" />
        <add name="C:\USERS\ZHILA\DESKTOP\GRIDVIEWEDITINSERT\APP_DATA\TESTDB.MDFConnectionString"
            connectionString="Data Source=SADRTEAM;Initial Catalog=C:\USERS\ZHILA\DESKTOP\GRIDVIEWEDITINSERT\APP_DATA\TESTDB.MDF;Integrated Security=True"
            providerName="System.Data.SqlClient" />
        <add name="ubing.ir_athuserConnectionString4" connectionString="Data Source=ubing.ir;Initial Catalog=ubing.ir_athuser;User ID=ubing.ir_athuser;Password=0"
            providerName="System.Data.SqlClient" />
    </connectionStrings>
    <system.web>
       <httpRuntime maxRequestLength="1048576" executionTimeout="600" />
      <compilation debug="false" strict="false" explicit="true" targetFramework="4.5.2"  />
     <!--<customErrors mode="Off"/>
      <compilation debug="true"/>-->
      <customErrors mode="Off" />
    </system.web>
<system.webServer>
    <security>
      <requestFiltering>
        <requestLimits maxAllowedContentLength="3000000000" />
      </requestFiltering>
    </security>
  </system.webServer>
</configuration>

این هم داخل وب کانفیگ من هست

البته رو لوکار کار میکنه وقتی رو هاست ا میشه این میاره 

متن ارور میگه یک object استفاده شده خالی است

کدها رو بررسی کنید