Web Forms :: How To Add Captcha Image Validation
Jun 23, 2012I want to have the captcha image validation where users need to enter the text shown in image.
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protected void CreateUserWizard1_CreatedUser(object sender, EventArgs e)
{
bool IsCaptcha;
IsCaptcha = validateCaptcha();
if (IsCaptcha == true)
StringBuilder bodyMsg = new StringBuilder();
TextBox textBoxUserName = (TextBox)CreateUserWizard1.CreateUserStep.ContentTemplateContainer.FindControl("UserName");
[code]...
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Mar 4, 2010i have a image control that show Captcha...
Problem:in the Host(not local system) Captcha show only one image that created for first time,but in my local system every things is right,and captcha change for every page load...
i think image can't find server folder address and always show first produced image!!!
see code:
[Code]....
where is the problem?
notice:when i see server "Upload" folder and "AddIntuitionReflexRandom.gif" file,content change truly,but that can't show in my image.
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Do i need the location section in the web.config file? If yes can you share the details for the same.
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When i run the site within VS2008, the captcha image works fine, but when i run the site via the internet i have no captcha image.
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Dec 9, 2010I used a custom captha inside my mvc application and it works perfectly fine in local but in production it isn't being generated. why is that?
I used the following statement for saving the image. do you think it is beacuse of that?
[Code]....
User Controls :: Captcha Control Not Showing Image?
Apr 17, 2012[URL]
I have implemented as writeen in the aritcle but the captcha image is not being shown when I run the application.why
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AJAX :: HTTP Generic Handler For Captcha Image Not Working Inside Update Panel
Mar 23, 2013I tried this link to generate verification Image [URL] ..... It works fine.
But I'd like to put a button in page for regenerating captcha for example. When the image was unreadable for user.
So I put an updatepanel in page and this is my code:
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<tr> <td colspan="2">
<asp:Image ID="imCaptcha" ImageUrl="~/Captcha.ashx" runat="server" />
[Code] .....
Although the image changes but the whole page is refreshed. Whether this is due to incompatibilities httphandler and updatepanel?
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Nov 19, 2010i want to upload particular image file in asp.net and i m using regularexpressionvalidation but there is some error occurs so please help me.. i m using this syntex..
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="FileUpload1"
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Web Forms :: How To Use Server Side Validation To Ensure Image Field Is Not Null
Aug 20, 2010I'm having trouble accomplishing the above. Below is all the mark up and code. I'm not getting error messages, but the validate image function is not working (fileupload portion is working ok).
In my attempt below---not sure if it's the simplest or best validation approach anyway---the "UserId" parameter appears during rendering to be empty---but in most methods I have it successfully containing or referring to the logged-in user's identification.
Following is the control that refers to the image field (page = advertisement.aspx):
<asp:Image ID="Image" runat="server" ImageUrl ='<%#Eval("UserId","Image.aspx?UserId={0}") %>'
Following is the successful code behind for the page image.aspx referred to above (page = image.aspx.vb):
[code]....
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View 1 RepliesWeb Forms :: How To Add Captcha
Aug 21, 2013i want to add captcha in my website.
View 1 RepliesWeb Forms :: How To Insert CAPTCHA
Jan 21, 2010My question to all. I have a feedback form php form. Here its code.
[Code]....
I wish to insert in this form CAPTCHA. There is for somebody have a code CAPTCHA which well works? And how to me it to insert?
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View 1 RepliesWeb Forms :: How To Implement Captcha
Jun 13, 2012The captcha is working fine..but when we reload the page and click the verify button without entering enything..it's throwing error. Also it's throwing the error when we enter the code wrong 2 times..It's throwing the error as
Object reference not set to an instance of an object.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Line 15:protected void btnVerify_Click(object sender, EventArgs e)
Line 15: {
Line 16: Captcha1.ValidateCaptcha(txtCaptcha.Text.Trim());
Line 17:
Line 18: if (Captcha1.UserValidated)
Web Forms :: Captcha + Aspx Form
Apr 1, 2010i had created a captcha coz by reffering a blog
http://nanddeepnachan.blogspot.com/2008/06/captcha-for-sharepoint-blog.html. its successfully can run after i deploy it.
I created a feedbackForm in aspx, then add the captcha web part. the captcha appeared in feedbackForm, but the problem is the data tat i added in feedbackForm cant insert in sharepoint list...
.aspx
[Code]....
.aspx.cs
[Code]....
Web Forms :: Link The Feedback Form With Captcha?
Mar 26, 2010i had created a aspx page..Feedback and i had created the captcha coding... both i created in different folder...i wanna link the Feedback form with the captcha... -wen i want send the feedback, i have to write the captcha...after tat only can send.. how to link the form n captcha??
View 4 RepliesWeb Forms :: OnServerClick - How To Validate Captcha In Javascript
Feb 10, 2011I would like to do the validation work using javascript or jquery in onclientclick and then show blockUI, next page using server click. But, I have a captcha validation in server click and I don't know how to validate the captcha in jquery or javascript.
protected void btnRegister_Click(object sender, EventArgs e) {
lblMessage.Text = ""; if (Page.IsValid) { if (txtUserName.Text == "") {
lblMessage.Text = "نام کاربری را وارد نمائید";
txtUserName.Focus(); return;
} if (!BLL.IsStrictPassword(txtPassword.Text)) {
lblMessage.Text = "طول کلمه عبور حداقل باید 5 کاراکتر باشد";
txtPassword.Focus(); return; } if (ddlYear.Text == "<سال>"
|| ddlMonth.Text == "<ماه>" || ddlDay.Text == "<روز>") {
lblMessage.Text = "لطفا تاریخ تولدتان را وارد نمائید";
return; } if (!chk_Low.Checked) {
lblMessage.Text = "برای عضویت می بایست قوانین سایت را بپذیرید"; return; } if (txtSecurityCode.Text == String.Empty) {
.Text = "کد امنیتی را وارد نکرده اید";
txtSecurityCode.Focus(); return; } secCode.ValidateCaptcha(txtSecurityCode.Text);
if (!secCode.UserValidated) {
lblMessage.Text = "کد امنیتی نادرست وارد شده است";
return; } try { //some code } }