Add to sql server table data from multiple TextBox-es in one query

Yes, so when I ask for 

Session["p1"] = txtRaspuns1.Text.ToString();

I get the result I need but when I run

for (int i = 1; i <= 3; i++)
    {
        string Raspuns = Request.Form["txtRaspuns" + i].ToString();
        string Corect = Request.Form["txtCorect" + i].ToString();
        int IdIntrebare = id;

        Dt.Rows.Add(Raspuns, Corect, IdIntrebare);
    }

I got an error. And still cannot figure it out :( 

By accessing the Text property of the TextBox controls (txtRaspuns1.Text, txtRaspuns2.Text, and txtRaspuns3.Text), you are now storing their actual values in the Session, and the data should be displayed correctly in the txtError1, txtError2, and txtError3 TextBoxes when you access the page again.

So, I got this

protected void Adauga_Raspunsuri(object sender, EventArgs e)
{
    Session["p1"] = txtRaspuns1.ToString();
    Session["p2"] = txtRaspuns2.ToString();
    Session["p3"] = txtRaspuns3.ToString();

    Response.Redirect("/AdminPages/Raspunsuri.aspx");
}

has to be

protected void Adauga_Raspunsuri(object sender, EventArgs e)
{
    Session["p1"] = txtRaspuns1.Text.ToString();
    Session["p2"] = txtRaspuns2.Text.ToString();
    Session["p3"] = txtRaspuns3.Text.ToString();

    Response.Redirect("/AdminPages/Raspunsuri.aspx");
}

so maybe there is something similar in ?

string Raspuns = Request.Form["txtRaspuns" + i].ToString();

Ok, I tried something else

I sent values from txtRaspuns1, 2 and 3 as session parameter and I got this value System.Web.UI.WebControls.TextBox

protected void Page_Load(object sender, EventArgs e)
{
    
    if (Session["p1"] != null)
    {
        txtError1.Text = Session["p1"].ToString();
    }
    if (Session["p2"] != null)
    {
        txtError2.Text = Session["p2"].ToString();
    }
    if (Session["p3"] != null)
    {
        txtError3.Text = Session["p3"].ToString();
    }
}

and 

protected void Adauga_Raspunsuri(object sender, EventArgs e)
{
    Session["p1"] = txtRaspuns1.ToString();
    Session["p2"] = txtRaspuns2.ToString();
    Session["p3"] = txtRaspuns3.ToString();

    Response.Redirect("/AdminPages/Raspunsuri.aspx");
}

why is that happening?

I get the same error as Request.Form

for (int i = 1; i <= 3; i++)

    {

        string Raspuns = Request.Params["txtRaspuns" + i];

        string Corect = Request.Params["txtCorect" + i];

        int IdIntrebare = id;

        Dt.Rows.Add(Raspuns, Corect, IdIntrebare);

    }

But I have no issues with the button, why bother?

the button is enabled once all three boxes have some data

$(document).ready(function () {

    $("#RasDiv").on("change", function () {

        var l1 = $("#txtRaspuns1").val().length;
        var l2 = $("#txtRaspuns2").val().length;
        var l3 = $("#txtRaspuns3").val().length;

        if (l1 == 0 || l2 == 0 || l3 == 0) {

            $("#btnSave").attr('disabled', 'disabled');
        }
        else {
            $("#btnSave").removeAttr('disabled');
        }
    });
});

When a button is disabled (Enabled="false"), it won't trigger any server-side events, including the Adauga_Raspunsuri method. Therefore, the button click event is not firing, and the data is not being processed on the server-side.

And I am posting with

I'm not posting directly but just populating textboxes with

$(document).ready(function () {

            $("#ddlCorect1").on("change", function () {

                var l1 = $("#ddlCorect1 option:selected").text();

                $("#txtCorect1").val(l1);

            });
            $("#ddlCorect2").on("change", function () {

                var l2 = $("#ddlCorect2 option:selected").text();

                $("#txtCorect2").val(l2);

            });
            $("#ddlCorect3").on("change", function () {

                var l3 = $("#ddlCorect3 option:selected").text();

                $("#txtCorect3").val(l3);

            });
        });

default values are NU for all

Before saving record you putting value in textboxea Okay,

How do you post the value to the server side using jquery? 

But I am writting text to those textboxes before save. At least for txtRaspuns1, 2 and 3.txtCorect is a jquery from ddl

Thank you Tahir. I already know there is no data, but why? Error here

To fix this issue, you can use the Enabled property instead of Visible. The Enabled property controls whether the control is rendered as part of the HTML form and whether its value is included in the Request.Form collection. Setting Enabled="false" will make the control non-editable, but its value will still be available in the Request.Form collection.

ASPX

By setting Enabled="true" for the TextBoxes that should contain user input and Enabled="false" for the TextBoxes that should be read-only, you ensure that their values will be accessible in the code-behind.

Add null checking condition in your code to handle issue

If the line string Raspuns = Request.Form["txtRaspuns" + i].ToString(); is resulting in an empty object, it means that the form field "txtRaspuns" + i does not exist in the Request.Form collection, or it does exist, but its value is empty or null.

To handle this situation, you can check if the form field exists in the Request.Form collection and if it has a non-empty value before attempting to use it.

C#

// Check if the form field exists and has a non-empty value
        if (!string.IsNullOrEmpty(Raspuns) && !string.IsNullOrEmpty(Corect))
        {
            Dt.Rows.Add(Raspuns, Corect, IdIntrebare);
        }
        else
        {
            // Handle the case where the form field is missing or has an empty value
            // For example, you can skip this iteration or log an error.
        }