sanjibBarik_dotnet: Registration from code using captcha validation using Asp.Net with c#

Hi guys,

For using captcha validation first we create a captchaimage.aspx page and call the page within the registration.aspx img tab imageurl =”captchaimage.aspx”. This <asp:image> tag used within registration page for display captcha image. For creae a image.aspx file we need SRVTextToImage.dll file . So we can download it first .

Captchaimage.aspx.cs file

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using SRVTextToImage;

using System.Drawing.Imaging;

using System.Drawing;

public partial class captchaimage : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

//captchaimage CI = new captchaimage();

CaptchaRandomImage CI = new CaptchaRandomImage();

// GetRandomString Function return random text of your provided characters size

string captchaText = CI.GetRandomString(5);

//GenearteImage function return image of the provided text of provided size

//CI.GenerateImage(captchaText, 200, 50);

//there is a overload function available for set color of the image

Session["CaptchaText"] = captchaText;

CI.GenerateImage(captchaText, 200, 50, Color.DarkGray, Color.White);

this.Response.Clear();

this.Response.ContentType = "image/jpeg";

CI.Image.Save(this.Response.OutputStream, ImageFormat.Jpeg);

CI.Dispose();

}

Now we create a registration page for use it.

Registration.aspx

<tr>

<td>

<tr>

<asp:Label ID="Label1" runat="server" Font-Bold="True" ForeColor="#000099" Text="UserId"></asp:Label>

</td>

<asp:TextBox ID="txtUserId" runat="server" Width="271px"></asp:TextBox>

</td>

<td>

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txtUserId" ErrorMessage="Enter a valid Userid" Font-Bold="True" ForeColor="#FF3300">*</asp:RequiredFieldValidator>

</td>

</tr>

<tr>

<asp:Label ID="Label2" runat="server" Font-Bold="True" ForeColor="#0033CC" Text="UserName"></asp:Label>

</td>

<asp:TextBox ID="txtFirstName" runat="server" Width="269px"></asp:TextBox>

</td>

<td>

<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtFirstName" ErrorMessage="Enter a valid Firstname" Font-Bold="True" ForeColor="Red">*</asp:RequiredFieldValidator>

</td>

</tr>

<tr>

<asp:Label ID="Label8" runat="server" Font-Bold="True" ForeColor="#3333FF" Text="PassWord"></asp:Label>

</td>

<asp:TextBox ID="txtPassWord" runat="server" TextMode="Password" Width="271px"></asp:TextBox>

</td>

<td>

<asp:RequiredFieldValidator ID="RequiredFieldValidator6" runat="server" ControlToValidate="txtPassWord" ErrorMessage="Enter a valid password" Font-Bold="True" ForeColor="Red">*</asp:RequiredFieldValidator>

</td>

</tr>

<tr>

<asp:Label ID="Label3" runat="server" Font-Bold="True" ForeColor="Blue" Text="LastName"></asp:Label>

</td>

<asp:TextBox ID="txtLastName" runat="server" Width="273px"></asp:TextBox>

</td>

<td>

<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ControlToValidate="txtLastName" ErrorMessage="Enter a valid lastname" Font-Bold="True" ForeColor="Red">*</asp:RequiredFieldValidator>

</td>

</tr>

<tr>

<asp:Label ID="Label4" runat="server" Font-Bold="True" ForeColor="Blue" Text="Email"></asp:Label>

</td>

<asp:TextBox ID="txtEmail" runat="server" Width="272px"></asp:TextBox>

</td>

<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="txtEmail" ErrorMessage="Enter a valid email id" Font-Bold="True" ForeColor="Red" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*">*</asp:RegularExpressionValidator>

<asp:RequiredFieldValidator ID="RequiredFieldValidator5" runat="server" ControlToValidate="txtEmail" ErrorMessage="Enter a email " Font-Bold="True" ForeColor="Red">*</asp:RequiredFieldValidator>

</td>

</tr>

<tr>

<asp:Label ID="Label5" runat="server" Font-Bold="True" ForeColor="Blue" Text="Gender"></asp:Label>

</td>

<asp:DropDownList ID="ddlGender" runat="server" Height="30px" Width="176px">

<asp:ListItem>--Select--</asp:ListItem>

<asp:ListItem>Male</asp:ListItem>

<asp:ListItem>Female</asp:ListItem>

</asp:DropDownList>

</td>

<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ControlToValidate="ddlGender" ErrorMessage="Enter a vaild gender" Font-Bold="True" ForeColor="Red">*</asp:RequiredFieldValidator>

</td>

</tr>

<tr>

<asp:Label ID="Label6" runat="server" Font-Bold="True" ForeColor="Blue" Text="Capt"></asp:Label>

</td>

<asp:Image ID="Imagecaptcha" ImageUrl="~/captchaimage.aspx" runat="server" />

</td>

</tr>

<tr>

<asp:Label ID="Label7" runat="server" Font-Bold="True" ForeColor="#3366FF" Text="Captcha Text"></asp:Label>

</td>

<asp:TextBox ID="txtCaptcha" runat="server" Width="269px"></asp:TextBox>

</td>

</tr>

<tr>

<asp:ImageButton ID="btnRegister" runat="server" Height="32px" ImageUrl="~/Images/register.jpg" Width="120px" OnClick="btnRegister_Click" />

<asp:Label ID="lblMsg" runat="server"></asp:Label>

</td>

</tr>

</table>

</td>

</tr>

</table>

Registration.aspx.cs file

public partial class UserRegister : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["123"].ConnectionString);

protected void btnRegister_Click(object sender, ImageClickEventArgs e)

{

// Here I will validate Captcha

bool isCaptchaValid = false;

if (Page.IsPostBack && (Session["CaptchaText"] != null && txtCaptcha.Text == Session["CaptchaText"].ToString()))

{

isCaptchaValid = true;

}

if (isCaptchaValid)

{

//if (Page.IsValid && (Session["CaptchaText"] != null && txtCaptchaText.Text == Session["CaptchaText"].ToString()))

//if (Page.IsValid && (Session["CaptchaText"] != null && txtCaptcha.Text = Session["CaptchaText"].ToString()))

try

{

SqlCommand cmd = new SqlCommand("sanregister", con);

cmd.CommandType = CommandType.StoredProcedure;

cmd.Parameters.Add(new SqlParameter("@UserId", SqlDbType.Int)).Value = txtUserId.Text;

cmd.Parameters.Add(new SqlParameter("@UserName", SqlDbType.VarChar, 50)).Value = txtFirstName.Text;

cmd.Parameters.Add(new SqlParameter("@PassWord", SqlDbType.VarChar, 50)).Value = txtPassWord.Text;

cmd.Parameters.Add(new SqlParameter("@LastName", SqlDbType.VarChar, 50)).Value = txtLastName.Text;

cmd.Parameters.Add(new SqlParameter("@Email", SqlDbType.VarChar, 50)).Value = txtEmail.Text;

cmd.Parameters.Add(new SqlParameter("@Gender", SqlDbType.VarChar, 50)).Value = ddlGender.SelectedValue.ToString();

cmd.Parameters.Add(new SqlParameter("@Capt", SqlDbType.VarChar, 50)).Value = txtCaptcha.Text;

//string Ins;

//Ins = " insert into mycap values('" + txtEmailID.Text + "','" + txtFeedback.Text + "','" + txtCaptchaText.Text + "')";

//cmd = new SqlCommand(Ins, con);

con.Open();

Session["user"] = txtFirstName.Text;

cmd.ExecuteNonQuery();

con.Close();

//lblMessage.Text = "Captcha Validation Success";

//lblMsg.Text = "Successfully insert data";

Response.Redirect("Mainaccess.aspx");

// lblMsg.ForeColor = Color.Green;

}

catch (Exception er)

{

lblMsg.Text = er.Message;

}

else

{

lblMsg.Text = "Captcha Validation Failed";

lblMsg.ForeColor = Color.Red;

}

sanjibBarik_dotnet

Thursday 25 June 2015

Registration from code using captcha validation using Asp.Net with c#

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