Implementing javascript confirm box in code behind C#

Question

I want to implement javascript confirm box from code behind.

My requirement is in a method I need to raise a confirm box ,based on the result I need to implement diff functionalites

For Example;

if OK of Confirm Box the add Tax

if cancel Then do not add tax

I am trying something like this but its not helping me

ScriptManager.RegisterStartupScript(Page, Page.GetType(), "confirm", "confirm('Add tax');", true);

Can anyone help.

my sample Code is

protected void Button1_Click(object sender, EventArgs e)
{
    Double mrp = 200.00;

    ScriptManager.RegisterStartupScript(Page, Page.GetType(), "confirm", "return confirm('Add Tax');", true);
    if (Confirm == "Ok")
    {
        //Add tax to mrp
    }
    else
    {
        //No tax for mrp
    }
}

Thank You..

You can get the value form confirm box if you write like this. Means you won't get weather user has pressed ok or cancle. — शेखर
– शेखर, Commented Mar 28, 2013 at 5:55
Can you provide some more detail. Means where are the button inside grid or somewhere else? — शेखर
– शेखर, Commented Mar 28, 2013 at 5:57
You need to explain it a bit more about structure and what exactly do you want? — शेखर
– शेखर, Commented Mar 28, 2013 at 6:05
Where do you want the value On button click? It would be better if you can explain a bit more. — शेखर
– शेखर, Commented Mar 28, 2013 at 6:21

KyleMit · Accepted Answer · 2013-12-04 19:42:50Z

7

Can you try like this.:

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <script type = "text/javascript">
        function Confirm() {
            var confirm_value = document.createElement("INPUT");
            confirm_value.type = "hidden";
            confirm_value.name = "confirm_value";
            if (confirm("Do you want to save data?")) {
                confirm_value.value = "Yes";
            } else {
                confirm_value.value = "No";
            }
            document.forms[0].appendChild(confirm_value);
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
      <asp:Button ID="btnConfirm" runat="server"
                  OnClientClick = "Confirm()"
                  OnClick="OnConfirm" 
                  Text="Raise Confirm"/>
    </form>
</body>
</html>

Fetching the User input server side

Now server side we need to fetch the user input that we stored in the dynamic hidden field and then based on whether he has selected OK or Cancel we need to execute different code.

public void OnConfirm(object sender, EventArgs e)
{
    string confirmValue = Request.Form["confirm_value"];
    if (confirmValue == "Yes")
    {
        //Your logic for OK button
    }
    else
    {
        //Your logic for cancel button
    }
}

From Server Side (Code Behind) Yes No Confirmation Message Box in ASP.Net

edited Dec 4, 2013 at 19:42

KyleMit♦

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answered Mar 28, 2013 at 6:59

Rahul Gokani

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2 Comments

Nagaraj Over a year ago

Yes currently I am implementing it the way you have suggested.So, is this the best way that we can do to implement this functionality???

Rahul Gokani Over a year ago

I think So.. As per your requirement I think this is the best way to do this. And Don't forget to mark it as answer it it helped you. Thnak you.

Rahul Gokani · Accepted Answer · 2013-03-28 06:12:30Z

2

You can use ScrptManager like:

ScriptManager.RegisterStartupScript(Page, Page.GetType(), "confirm", "return confirm('Your massage to be Displayed.');", true);

You can refer this link for more details.

Or you can try like this.

ScriptManager.RegisterStartupScript(this, typeof(string), "Message", "if(confirm('Sorry, but there is already a Primary Stakeholder assigned to this ticket. Would you like to replace the existing data?')){alert('OK');}else{alert('cancel');}",true);

In the adove code If user press OK button, It will display alert box with message OK else it will display alert box with message Cancel.

ScriptManager.RegisterClientScriptBlock(this, GetType(), "__Mensagem", "if (confirm('" + CustomMessage+ "')){$(\"#" + btnSave.ClientID + "\").click();}", true);

Can you try this. In this if confirm returns true then it returns the click event of the button.

edited Mar 28, 2013 at 6:12

answered Mar 28, 2013 at 5:45

Rahul Gokani

1,7365 gold badges25 silver badges43 bronze badges

11 Comments

Nagaraj Over a year ago

can you tel me how could i get the value of confirm box, i.e., whether ok or cancel

Rahul Gokani Over a year ago

Check the link I have put in the answer.

शेखर Over a year ago

@RahulGokani it is not going to help him because he will bot be able to know which button of confirm is being pressed.

Rahul Gokani Over a year ago

@Shekhar Confirm returns only true or false. In the second code it shows that if it is true then it will execute the true statement or it will go into the else statement. It is not that which button is pressed.

शेखर Over a year ago

your are right but how he will get value in C#? Because on that he will like to do code?

|

Ashwini Verma · Accepted Answer · 2013-03-28 06:58:48Z

0

please try following:

Double mrp = 200.00;
System.Text.StringBuilder sb = new System.Text.StringBuilder();
sb.Append("var x=''; var r=confirm('Press a button!');");
sb.Append("if (r==true){alert('ok'); x='" + mrp + "';}");
sb.Append("else{ alert('cancel');}");
sb.Append("document.getElementById('demo').innerHTML=x;");
ScriptManager.RegisterStartupScript(Page, Page.GetType(), "confirm", sb.ToString(), true);

aspx page:

<p id="demo"></p>

edited Mar 28, 2013 at 6:58

answered Mar 28, 2013 at 6:13

Ashwini Verma

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2 Comments

Nagaraj Over a year ago

Actually my requirement is to do it from source behind..Currently I am implementing it like this only..but i am trying to find a solution where every thing is in source behind

Ashwini Verma Over a year ago

@Cherry: I changed my answer. you can write you javascript code right in the page.

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