How to Improving performance of nested dropdownlist in asp.net

Okk i got it now, You might be maintaining some kind of Huge ViewState Data, Then it happens.
same code works in other page but not in this means, this is the problem,

Try to minimize Viewstate you are maintaining


Check this is correct answer if it helepd

Hello sir good morning

Here is my db code in LINQ and districts my be 20+
and when i write same code for dropdownlist on another page it work fine.

 public IList GetAllDistrictByStateId(int stateId)
   {
      return db.Districts.OrderBy(o => o.DistrictName).Where(o => o.StateId==stateId).ToList();
    }

Is this is the only code, 
How many  Districts you are gettig in result,

By be your database script is slow,
if yes try to optimize that.


Check this is correct answer if it helped

hi Sukesh
 Thanks for quick reply....
and my is here but it takes time when i publish my website on server..




           OnSelectedIndexChanged="ddlPatientState_SelectedIndexChanged" TabIndex="11">
   
          ControlToValidate="ddlPatientState" Display="Dynamic" ErrorMessage="Please Select State" ForeColor="Red" InitialValue="-1"
      SetFocusOnError="true" ToolTip="Please Select State">
   


   


--------------------------------------------------------------------------------------------
     protected void ddlPatientState_SelectedIndexChanged(object sender, EventArgs e)
        {

            ddlPatientDistrict.Items.Clear();
            ddlPatientDistrict.DataSource = objDataAccess.GetAllDistrictByStateId(Convert.ToInt32(ddlPatientState.SelectedValue));
            ddlPatientDistrict.DataTextField = "DistrictName";
            ddlPatientDistrict.DataValueField = "DistrictId";
            ddlPatientDistrict.DataBind();
            ddlPatientDistrict.Items.Insert(0, new ListItem("Please Select", "-1"));
            ddlPatientTahsil.Items.Clear();
            ddlPatientTahsil.Items.Insert(0, new ListItem("Please Select", "-1"));
        }