Generate textchanged events in jquery

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i have 20 textchanged like (txtDescription1_TextChanged..............txtDescription20_TextChanged>
events like below code.by doing like this the result should come very slowly i want this event in jquery code can u plz help any one........

C#

protected void txtDescription1_TextChanged(object sender, EventArgs e)
        {
            DataTable qpdataset1 = new DataTable();
            if (!txtDescription1.Text.Equals(String.Empty) && (drpdownlistState.Text.Equals("VAT SALES")))
            {
                txtVatPercent1.Text = "5";
                txtSno1.Text = "1";

            }
            else if (!txtDescription1.Text.Equals(String.Empty) && (drpdownlistState.Text.Equals("CST SALES")))
            {

                txtVATAmt1.Text = "2";
                txtSno1.Text = "1";
            }
            else
            {
                txtVatPercent1.Text = "";
                txtSno1.Text = "1";


            }

            string desname = txtDescription1.Text.ToString();
            qpdataset1 = getqtyandprice(desname);
            DataSet dsCustomerChecking = GetRequiredDataTable("SELECT * FROM TAXINVOICE where CUSTOMERNAME = '" + txtcustomername.Text.Trim() + "'");
            if (dsCustomerChecking.Tables[0].Rows.Count > 0)
            {

                if (qpdataset1.Rows.Count > 0)
                {

                    txtPrice1.Text = qpdataset1.Rows[0]["UnitPrice"].ToString();

                    DropDownListUOM1.Text = qpdataset1.Rows[0]["UOM"].ToString();

                }
            }
        }

What I have tried:

i am new in jquery i have no idea about on this events functions in jquery

Posted 27-Jun-17 22:37pm

Member 12742983

Updated 28-Jun-17 21:54pm

Thanks7872

v2

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Comments

Thanks7872 28-Jun-17 4:41am

Add a class to all the textboxes. Define change event for that class

$(".yourclass").on('change', function() {......alert($(this).val())..});

Kornfeld Eliyahu Peter 28-Jun-17 9:17am

Where you hide jQuery?
On what base you decided that 20 event handler-definitions make you application slow?
As you are going to SQL you have to come to the server anyway - not sure jQuery can help you here...

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Member 10000326 · Accepted Answer · 2017-06-28T21:54:00

use Jquery ajax in your code pass all the form inputs to your webmetod. 

Here is Clint side code

$(".txtDescription").on('change', function() {

if($(this).val()=='' &&$("#drpdownlistState").val()=="SALES"
{
  $('#txtVatPercent1').val("5");
  $('#txtSno1').val("1");
}
else if(your condition)
{
//Change this code 
 $('#txtVatPercent1').val("5");
  $('#txtSno1').val("1");
}
else
{
//Change this code 
 $('#txtVatPercent1').val("5");
  $('#txtSno1').val("1");
}

  $.ajax({
                type: "POST",
                url: "/Services/Webform1.aspx/DescriptionChange",
                data: "{txtDescription1: $('#txtDescription1').val(),
                        drpdownlistState: $('#drpdownlistState').val(),
                        txtVatPercent1: $('#txtVatPercent1').val(),
                        txtSno1: $('#txtSno1').val(),
                        txtcustomername: $('#txtcustomername').val(),
                        }",
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (data) {
                    $("#txtPrice1").val(data.price);
                    $("#DropDownListUOM1").val(data.uom);
                },
                failure:function(data){
                           alert("failed");
                         }
            });

});

Here is your server side code
Add this method in your aspx file
[WebMethod]
public static string DescriptionChange(string txtDescription1, string drpdownlistState,string 
 txtVatPercent1, string txtSno1,string txtcustomername)
{
       var chk;
            string desname = txtDescription1.Text.ToString();
            qpdataset1 = getqtyandprice(desname);
            DataSet dsCustomerChecking = GetRequiredDataTable("SELECT * FROM TAXINVOICE where CUSTOMERNAME = '" + txtcustomername.Trim() + "'");
            if (dsCustomerChecking.Tables[0].Rows.Count > 0)
            {
 
                if (qpdataset1.Rows.Count > 0)
                {
 chk = new 
  {
    price= qpdataset1.Rows[0]["UnitPrice"].ToString() ,
    uom= qpdataset1.Rows[0]["UOM"].ToString();
  };
 
                }
            }

 return JsonConvert.SerializeObject(chk);
}