How to use ServerValidate function for CustomValidator using C# in ASP.Net

Hi yati,

Do you want this using server side or client side.

Hi dharmendr,

I want to use server side.

Hi yeti,

Refer the below sample.

HTML

<div>
    <table>
        <tr>
            <td>
                Name
            </td>
            <td>
                <asp:TextBox ID="txtName" runat="server" />
            </td>
        </tr>
        <tr>
            <td>
                Age
            </td>
            <td>
                <asp:TextBox ID="txtAge" runat="server" />
            </td>
        </tr>
        <tr>
            <td>
                Address
            </td>
            <td>
                <asp:TextBox ID="txtAddress" runat="server" />
            </td>
        </tr>
        <tr>
            <td>
                Phone No
            </td>
            <td>
                <asp:TextBox ID="txtPhoneNo" runat="server" />
            </td>
        </tr>
        <tr>
            <td>
                Occupation
            </td>
            <td>
                <asp:TextBox ID="txtOccupation" runat="server" />
            </td>
        </tr>
        <tr>
            <td>
                Gender
            </td>
            <td>
                <asp:RadioButtonList runat="server" ID="rblGender">
                    <asp:ListItem Text="Male" />
                    <asp:ListItem Text="Female" />
                </asp:RadioButtonList>
            </td>
        </tr>
        <tr>
            <td>
                Race
            </td>
            <td>
                <asp:DropDownList ID="ddlRace" runat="server">
                    <asp:ListItem Text="Select" />
                    <asp:ListItem Text="India" />
                    <asp:ListItem Text="Chinese" />
                    <asp:ListItem Text="Malay" />
                </asp:DropDownList>
            </td>
        </tr>
        <tr>
            <td>
                <asp:Button Text="Submit" runat="server" OnClick="SaveClick" ValidationGroup="ValidateClick" />
            </td>
        </tr>
    </table>
    <br />
    <asp:CustomValidator ID="cvApplicantRegister" ErrorMessage="" SetFocusOnError="true"
        runat="server" Display="Dynamic" OnServerValidate="cvRegister_ServerValidate"
        ValidationGroup="ValidateClick" ont-Bold="False" Font-Italic="True" Font-Strikeout="False"
        ForeColor="Red"></asp:CustomValidator>
</div>

Code

protected void cvRegister_ServerValidate(object sender, ServerValidateEventArgs args)
{
    if (string.IsNullOrEmpty(txtAddress.Text.Trim()))
    {
        Message("Address is Required!");
        txtAddress.Focus();
        args.IsValid = false;
    }
    else if (string.IsNullOrEmpty(txtPhoneNo.Text.Trim()))
    {
        Message("Phone No is Required!");
        txtPhoneNo.Focus();
        args.IsValid = false;
    }
    else if (rblGender.SelectedIndex == -1)
    {
        Message("Please select gender");
        args.IsValid = false;
    }
    else if (ddlRace.SelectedIndex == 0)
    {
        Message("Please select race");
        args.IsValid = false;
    }
    else
    {
        args.IsValid = true;
    }
}

private void Message(string control)
{
    ClientScript.RegisterClientScriptBlock(this.GetType(), "Required", "alert('" + control + "')", true);
}

protected void SaveClick(object sender, EventArgs e)
{
    if (Page.IsValid)
    {

    }
}

Hi dharmendr,

Refer the below code,

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Web.Configuration;
using System.Globalization;
using System.IO;
using System.Data.OleDb;
using System.Web.Security;

using System.Net;
using System.Net.Mail;
using System.Text;


public partial class applicantsRegister : System.Web.UI.Page
{
    DateTime now = DateTime.Now;
    SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ToString());

    protected void cvRegister_ServerValidate(object Sender, ServerValidateEventArgs e)
    {
        if (string.IsNullOrEmpty(txtUsername.Text.Trim()))
        {
            Message("Username is Required!");
            txtUsername.Focus();
        }
        else if (string.IsNullOrEmpty(txtPassword.Text.Trim()))
        {
            Message("Password is Required!");
            txtPassword.Focus();
        }
        else if (string.IsNullOrEmpty(txtcPassword.Text.Trim()))
        {
            Message("Password is Required!");
            txtcPassword.Focus();
        }
        else if (string.IsNullOrEmpty(txtName.Text.Trim()))
        {
            Message("Name is Required!");
            txtName.Focus();
        }
        else if (string.IsNullOrEmpty(txtDOB.Text.Trim()))
        {
            Message("Date of Birth is Required!");
            txtDOB.Focus();
        }
        else if (rblGender.SelectedIndex == -1)
        {
            Message("Please select gender");
        }
        else if (string.IsNullOrEmpty(txtICNumber.Text.Trim()))
        {
            Message("Identification Number is Required!");
            txtICNumber.Focus();
        }
        else if (ddlReligion.SelectedIndex == 0)
        {
            Message("Please select religion");
        }
        else if (ddlRace.SelectedIndex == 0)
        {
            Message("Please select race");
        }
        else if (string.IsNullOrEmpty(txtAddress.Text.Trim()))
        {
            Message("Address is Required!");
            txtAddress.Focus();
        }
        else if (string.IsNullOrEmpty(txtPostcode.Text.Trim()))
        {
            Message("Postcode is Required!");
            txtPostcode.Focus();
        }
        else if (string.IsNullOrEmpty(txtMobile.Text.Trim()))
        {
            Message("Mobile No is Required!");
            txtMobile.Focus();
        }
        else if (string.IsNullOrEmpty(txtEmail.Text.Trim()))
        {
            Message("Email is Required!");
            txtEmail.Focus();
        }
       
    }

    private void Message(string control)
    {
        ClientScript.RegisterClientScriptBlock(this.GetType(), "Required", "alert('" + control + "')", true);
    }


    //Apply Button
    protected void btnApply_Click(object sender, EventArgs e)
    {

        if (Page.IsValid)
        {
            string applicantIC = txtICNumber.Text;

            con.Open();

            String queryA = "SELECT ap_icno FROM tbl_applicantsdetails WHERE ap_icno = '" + applicantIC + "' ";

            SqlCommand cmdA = new SqlCommand(queryA, con);
            SqlDataReader drA = cmdA.ExecuteReader();

            if (drA.Read())
            {

                string message = " Duplicate IC Number found.";
                string url = "applicantsRegister.aspx";
                string script = "window.onload = function(){ if(alert('";
                script += message;
                script += "'));";
                script += "window.location = '";
                script += url;
                script += "'; }";
                ClientScript.RegisterStartupScript(this.GetType(), "Redirect", script, true);

            }
            else
            {

                //declare store procedure
                string query = "submitApplicants";
                int ap_id;

                if (declaration.Checked == false)
                {
                    msg.Text = "Please tick on the declaration division if you agree";
                    return;
                }
                else
                {
                    msg.Text = "";

                    SqlCommand cmdUser = new SqlCommand(query, con);
                    cmdUser.CommandType = CommandType.StoredProcedure;

                    cmdUser.Parameters.Add("@ap_id", SqlDbType.Int, 0, "ap_id");
                    cmdUser.Parameters["@ap_id"].Direction = ParameterDirection.Output;
                    cmdUser.Parameters.Add("@ap_username", SqlDbType.NVarChar).Value = txtUsername.Text;
                    cmdUser.Parameters.Add("@ap_password", SqlDbType.NVarChar).Value = txtPassword.Text;
                    cmdUser.Parameters.Add("@ap_name", SqlDbType.NVarChar).Value = txtName.Text;


                    {
                        // Save the file

                        int length = upImage.PostedFile.ContentLength;
                        byte[] pic = new byte[length];

                        upImage.PostedFile.InputStream.Read(pic, 0, length);
                        cmdUser.Parameters.AddWithValue("@ap_photo", pic);

                    }

                    cmdUser.Parameters.Add("@ap_icno", SqlDbType.NVarChar).Value = txtICNumber.Text;
                    cmdUser.Parameters.Add("@ap_dateofbirth", SqlDbType.Date).Value = txtDOB.Text;
                    cmdUser.Parameters.Add("@ap_gender", SqlDbType.NVarChar).Value = rblGender.Text;
                    cmdUser.Parameters.Add("@ap_religion", SqlDbType.NVarChar).Value = ddlReligion.Text;
                    cmdUser.Parameters.Add("@ap_race", SqlDbType.NVarChar).Value = ddlRace.Text;
                    cmdUser.Parameters.Add("@ap_nationality", SqlDbType.NVarChar).Value = txtNationality.Text;
                    cmdUser.Parameters.Add("@ap_maritalstatus", SqlDbType.NVarChar).Value = ddlMarital.Text;
                    cmdUser.Parameters.Add("@ap_address", SqlDbType.NVarChar).Value = txtAddress.Text;
                    cmdUser.Parameters.Add("@ap_city", SqlDbType.NVarChar).Value = txtCity.Text;
                    cmdUser.Parameters.Add("@ap_state", SqlDbType.NVarChar).Value = txtState.Text;
                    cmdUser.Parameters.Add("@ap_postcode", SqlDbType.Int).Value = Convert.ToInt32(txtPostcode.Text);
                    cmdUser.Parameters.Add("@ap_contacthome", SqlDbType.NVarChar).Value = txtHome.Text;
                    cmdUser.Parameters.Add("@ap_contactmobile", SqlDbType.NVarChar).Value = txtMobile.Text;
                    cmdUser.Parameters.Add("@ap_email", SqlDbType.NVarChar).Value = txtEmail.Text;
                    cmdUser.Parameters.Add("@ap_datecreated", SqlDbType.DateTime).Value = now;


                    if (upResume.HasFile == false)
                    {
                        // No file uploaded!
                        msg.Text = "Please first select a file to upload";
                    }
                    else
                    {
                        // Save the file
                        string filePath = Server.MapPath("~/resume/" + upResume.FileName);
                        upResume.SaveAs(filePath);
                    }

                    cmdUser.Parameters.Add("@ap_attachresume", SqlDbType.NVarChar).Value = upResume.FileName;

                    cmdUser.ExecuteNonQuery();
                    ap_id = (int)cmdUser.Parameters["@ap_id"].Value;
                }


                // redirect to Job Listing page with querystring ap_id & msg = saved
                string message = "Your details has been saved. ";
                string url = "jobListing.aspx?ap_id=" + ap_id;
                string script = "window.onload = function(){ if(alert('";
                script += message;
                script += "'));";
                script += "window.location = '";
                script += url;
                script += "'; }";
                ClientScript.RegisterStartupScript(this.GetType(), "Redirect", script, true);
            }
        }
        else
        {
            msg.Text = "Fill up the information required";
        }
    }

    //Cancle Button
    protected void btnCancel_Click(object sender, EventArgs e)
    {
        Response.Redirect("home.aspx");
    }
}

I put this code below at front page to call the process

                    <asp:CustomValidator id="cvApplicantRegister" ErrorMessage="" SetFocusOnError="true"  runat="server"  Display="Dynamic" OnServerValidate="cvRegister_ServerValidate" ValidationGroup="ValidateClick" ont-Bold="False" Font-Italic="True" Font-Strikeout="False" ForeColor="Red" ></asp:CustomValidator>

May I know why this code is not function? Can I separate the server validation and make it another class or I need to paste the code into "btnApply_Click"?

Hi yeti,

Add ValidationGroup="ValidateClick" for apply button and modify the code as i have modified in my previous reply. Refer the below link.

http://www.aspforums.net/Threads/178041/Server-Validation/Replies/3#Replies