How to show the DB validation confirmation message in button click event

Question

1.80/5 (2 votes)

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On the Button Save event, i want to check the name exist in the database or not. if exist then i want to show the confirmation message like "Same Name already exist! Do you want to continue?". if the user press "Yes" then Save all details to database otherwise No.

What I have tried:

I tried in google, but all shows the client side validation.

Posted 12-Oct-18 6:50am

Robymon

Updated 12-Oct-18 7:59am

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Comments

summiya1 12-Oct-18 13:38pm

Can you show us your piece of code ? you can try remote validation its server side validation using data Annotation if you are using MVC

Robymon 12-Oct-18 13:38pm

i am not using MVC

summiya1 12-Oct-18 13:44pm

then you can do it using change event on textbox onchange="UserAvailability()"

Robymon 12-Oct-18 13:54pm

sorry, this is just an example mentioned in the question. i need to validate from database with different types of database validations and save only when the user clicks "Yes" button.

summiya1 12-Oct-18 14:00pm

Check My Solution below

summiya1 12-Oct-18 14:05pm

oh I thought you only have to validate one before submitting form..
you can check my solution though

2 solutions

Solution 1

Use Javascript code. put this code on button client click event.

JavaScript

confirm("Same Name already exist! Do you want to continue?");

Posted 12-Oct-18 7:53am

kanangandhi

Comments

Robymon 12-Oct-18 14:02pm

i tried this, button when we click "Yes" it won't proceed to next code. it stops and go to page load event.

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summiya1 · Accepted Answer · 2018-10-12T08:00:00

Check this code 
<pre><asp:TextBox ID="Name" runat="server" onchange="checkName()" />  
<pre><div id="checkName" runat="server">                             
<asp:Label ID="lblStatus" runat="server"></asp:Label></div>

<script src="Scripts/jquery-1.7.1.min.js"></script>  
 <script type="text/javascript">  
  
        function checkName() { //This function call on text change.             
            $.ajax({  
                type: "POST",  
                url: "URL Here", // this for calling the web method in cs code.  
                data: '{Name: "' + $("#<%=txtName.ClientID%>")[0].value + '" }', 
                contentType: "application/json; charset=utf-8",  
                dataType: "json",  
                success: OnSuccess,  
                failure: function (response) {  
                    alert(response);  
                }  
            });  
        }  
  
        // function OnSuccess  
        function OnSuccess(response) {  
            /// Show your message here bind with error label 
            }  
        }  
  
    </script>

Code Behind

[System.Web.Services.WebMethod]  
public static string CheckName(string Name)  
{  
    string retval = "";  
    SqlConnection con = new SqlConnection("data source");  
    con.Open();  
    SqlCommand cmd = new SqlCommand("select Name from tableName where Name=@Name",con);  
    cmd.Parameters.AddWithValue("@Name", Name);  
    SqlDataReader dr = cmd.ExecuteReader();  
    if (dr.HasRows)  
    {  
        retval = "true";            
    }  
    else  
    {  
        retval = "false";            
    }  
  
  return retval;  
}