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POValidate dynamic texbox's on button click
 

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  1. POValidate dynamic texbox's on button click
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    <p>Alright so i've been dealing with this issue for two days now and i haven't solved the issue. I would like to validate the textbox's with RegularExpressionValidation.</p> <ol> <li>User selects yes or no from the dropbox</li> <li>if yes, then they click the button to open a form for inputs</li> <li>Fill out texbox's, not all are required but if they do fill in such as date then it has to be in the proper format.</li> <li>If valid the next button on the wizard is visible again and a new set of textbox's will show up. Note: the only time the next button shows up is if everything is valid.</li> </ol> <p><strong>My main issue is i want it to validate only this wizard step not the whole "page"</strong></p> <p>I keep getting the error whenever i click the button but it is probably from the regex. validate():</p> <p>System.NullReferenceException: Object reference not set to an instance of an object.</p> <pre><code>Source Error: Line 590: Line 591: Line 592: addressRegEx.Validate(); &lt;---Whats in red Line 593: EmployerRequired.Validate(); Line 594: phoneRegex.Validate(); </code></pre> <p>C#:</p> <pre><code>protected void Page_Load(object sender, EventArgs e) { for (int i = 0; i &lt; TotalNumberAddedEmployment; ++i) { addcontrolsemployment(i + 1); } if (Wizard1.ActiveStep == WizardStep3) { Button nxtButton = (Button)Wizard1.FindControl("StepNavigationTemplateContainerID$StepNextButton"); nxtButton.Visible = false; } } public void addcontrolsemployment(int controlnumberEmp) { var newPanel = new Panel(); var employerLabel = new Label(); var addressLabel = new Label(); var phoneLabel = new Label(); var fromDateLabel = new Label(); var toDateLabel = new Label(); var supervisorLabel = new Label(); var jobTitleLabel = new Label(); var dutiesLabel = new Label(); var hoursLabel = new Label(); var wageLabel = new Label(); var leavingLabel = new Label(); var employerTextbox = new TextBox(); var addressTextbox = new TextBox(); var phoneTextbox = new TextBox(); var fromDateTextbox = new TextBox(); var toDateTextbox = new TextBox(); var supervisorTextbox = new TextBox(); var jobTitleTextbox = new TextBox(); var dutiesTextbox = new TextBox(); var hoursTextbox = new TextBox(); var wageTextbox = new TextBox(); var leavingTextbox = new TextBox(); // textbox needs a unique id to maintain state information employerTextbox.ID = "EmployerTextBox_" + controlnumberEmp; employerTextbox.Width = 250; //employerTextbox.Text = "Enter Employer Here"; addressTextbox.ID = "AddressTextbox_" + controlnumberEmp; addressTextbox.AutoPostBack = true; phoneTextbox.ID = "phoneTextbox_" + controlnumberEmp; phoneTextbox.AutoPostBack = true; fromDateTextbox.ID = "fromDateTextbox_" + controlnumberEmp; toDateTextbox.ID = "toDateTextbox_" + controlnumberEmp; toDateTextbox.AutoPostBack = true; supervisorTextbox.ID = "supervisorTextbox_" + controlnumberEmp; supervisorTextbox.AutoPostBack = true; jobTitleTextbox.ID = "jobTitleTexbox_" + controlnumberEmp; jobTitleTextbox.AutoPostBack = true; dutiesTextbox.ID = "dutiesTextbox_" + controlnumberEmp; dutiesTextbox.Width = 250; dutiesTextbox.AutoPostBack = true; hoursTextbox.ID = "hoursTexbox_" + controlnumberEmp; hoursTextbox.AutoPostBack = true; wageTextbox.ID = "wageTexbox_" + controlnumberEmp; wageTextbox.AutoPostBack = true; leavingTextbox.ID = "leavingTexbox_" + controlnumberEmp; leavingTextbox.Width = 250; leavingTextbox.AutoPostBack = true; //Label text employerLabel.Text = "Employer: "; addressLabel.Text = "Address: "; phoneLabel.Text = "Phone #: "; toDateLabel.Text = "To Date: "; fromDateLabel.Text = "From Date: "; supervisorLabel.Text = "Supervisor: "; jobTitleLabel.Text = "Job Title: "; dutiesLabel.Text = "Major Duties: "; hoursLabel.Text = "Hours Per Week:"; wageLabel.Text = "Final Wage: "; leavingLabel.Text = "Reason for Leaving: "; //Regular Expression and Required field validators var addressRegEx = new RegularExpressionValidator(); var EmployerRequired = new RequiredFieldValidator(); var phoneRegex = new RegularExpressionValidator(); var toDateRegex = new RegularExpressionValidator(); var fromDateRegex = new RegularExpressionValidator(); var supervisorRegex = new RegularExpressionValidator(); var jobTitleRegex = new RegularExpressionValidator(); var dutiesRegex = new RegularExpressionValidator(); var hoursRegex = new RegularExpressionValidator(); var wageRegex = new RegularExpressionValidator(); var leavingRegex = new RegularExpressionValidator(); EmployerRequired.Text = "Enter NA if No History"; EmployerRequired.ID = "employerRequired" + controlnumberEmp; EmployerRequired.ControlToValidate = employerTextbox.ID; EmployerRequired.ValidationGroup = "EmploymentValid"; addressRegEx.ValidationExpression = ".{0,50}"; addressRegEx.Text = "Please Enter less than 50 characters for address"; addressRegEx.ErrorMessage = "Please Enter less than 50 characters for address"; addressRegEx.ControlToValidate = addressTextbox.ID; //addressRegEx.ValidationGroup = "EmploymentValid"; phoneRegex.ID = "phoneRegex" + controlnumberEmp; phoneRegex.Text = "Please enter in (###)###-####"; phoneRegex.ControlToValidate = phoneTextbox.ID; phoneRegex.ValidationExpression = @"((\(\d{3}\) ?)|(\d{3}-))?\d{3}-\d{4}"; // phoneRegex.ValidationGroup = "EmploymentValid"; toDateRegex.ID = "toDateRegex" + controlnumberEmp; toDateRegex.Text = "Please enter in MM/DD/YYY form"; toDateRegex.ValidationExpression=@"^(((0?[1-9]|1[012])/(0?[1-9]|1\d|2[0-8])|(0?[13456789]|1[012])/(29|30)|(0?[13578]|1[02])/31)/(19|[2-9]\d)\d{2}|0?2/29/((19|[2-9]\d)(0[48]|[2468][048]|[13579][26])|(([2468][048]|[3579][26])00)))$"; toDateRegex.ControlToValidate = toDateTextbox.ID; // toDateRegex.ValidationGroup = "EmploymentValid"; fromDateRegex.ID = "fromDateRegex" + controlnumberEmp; fromDateRegex.Text = "Please enter in MM/DD/YYY form"; fromDateRegex.ValidationExpression=@"^(((0?[1-9]|1[012])/(0?[1-9]|1\d|2[0-8])|(0?[13456789]|1[012])/(29|30)|(0?[13578]|1[02])/31)/(19|[2-9]\d)\d{2}|0?2/29/((19|[2-9]\d)(0[48]|[2468][048]|[13579][26])|(([2468][048]|[3579][26])00)))$"; fromDateRegex.ControlToValidate = fromDateTextbox.ID; // fromDateRegex.ValidationGroup = "EmploymentValid"; supervisorRegex.ID = "supervisorRegex" + controlnumberEmp; supervisorRegex.Text = "Please enter in 20 characters or less"; supervisorRegex.ValidationExpression = ".{0,20}"; supervisorRegex.ControlToValidate = supervisorTextbox.ID; // supervisorRegex.ValidationGroup = "EmploymentValid"; jobTitleRegex.ID = "jobTitleRegex" + controlnumberEmp; jobTitleRegex.Text = "Please enter 30 characters or less"; jobTitleRegex.ValidationExpression = ".{0,30}"; jobTitleRegex.ControlToValidate = jobTitleTextbox.ID; // jobTitleRegex.ValidationGroup = "EmploymentValid"; dutiesRegex.ID = "dutiesRegex" + controlnumberEmp; dutiesRegex.Text = "Please enter 60 characters or less"; dutiesRegex.ValidationExpression = ".{0,60}"; dutiesRegex.ControlToValidate = dutiesTextbox.ID; // dutiesRegex.ValidationGroup = "EmploymentValid"; hoursRegex.ID = "hoursRegex" + controlnumberEmp; hoursRegex.Text = "Please enter up to 3 digits"; hoursRegex.ValidationExpression = "[0-9]{0,3}"; hoursRegex.ControlToValidate = hoursTextbox.ID; // hoursRegex.ValidationGroup = "EmploymentValid"; wageRegex.ID = "wageRegex" + controlnumberEmp; wageRegex.Text = "Please enter in currency format"; wageRegex.ValidationExpression = @"(?n:(^\$?(?!0,?\d)\d{1,3}(?=(?&lt;1&gt;,)|(?&lt;1&gt;))(\k&lt;1&gt;\d{3})*(\.\d\d)?)$)"; wageRegex.ControlToValidate = wageTextbox.ID; // wageRegex.ValidationGroup = "EmploymentValid"; leavingRegex.ID = "leavingRegex" + controlnumberEmp; leavingRegex.Text = "Please enter 60 characters or less"; leavingRegex.ValidationExpression = ".{0,60}"; leavingRegex.ControlToValidate = leavingTextbox.ID; // leavingRegex.ValidationGroup = "EmploymentValid"; // add the label and textbox to the panel, then add the panel to the form newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); //newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(new LiteralControl("&lt;table border='2px'&gt;&lt;tr&gt;")); newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(new LiteralControl("&lt;td class='title-text' &gt;")); newPanel.Controls.Add(employerLabel); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text'width='180px' colspan='2'&gt;")); newPanel.Controls.Add(employerTextbox); newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(EmployerRequired); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td class='title-text' &gt;")); newPanel.Controls.Add(addressLabel); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(addressTextbox); newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(addressRegEx); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;")); newPanel.Controls.Add(new LiteralControl("&lt;td class='title-text'&gt;")); newPanel.Controls.Add(phoneLabel); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(phoneTextbox); newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(phoneRegex); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(fromDateLabel); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(fromDateTextbox); newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(fromDateRegex); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(toDateLabel); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(toDateTextbox); newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(toDateRegex); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(supervisorLabel); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(supervisorTextbox); newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(supervisorRegex); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(jobTitleLabel); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(jobTitleTextbox); newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(jobTitleRegex); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(dutiesLabel); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text' colspan='2'&gt;")); newPanel.Controls.Add(dutiesTextbox);//next to it newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(dutiesRegex); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(hoursLabel); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(hoursTextbox); newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(hoursRegex); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(wageLabel); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(wageTextbox); newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(hoursRegex); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td class='title-text'&gt;")); newPanel.Controls.Add(leavingLabel); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;td class='title-text' colspan='2'&gt;")); newPanel.Controls.Add(leavingTextbox); // next to it newPanel.Controls.Add(new LiteralControl("&lt;br /&gt;")); newPanel.Controls.Add(leavingRegex); newPanel.Controls.Add(new LiteralControl("&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;br /&gt;&lt;hr&gt;")); addressRegEx.Validate(); EmployerRequired.Validate(); phoneRegex.Validate(); toDateRegex.Validate(); fromDateRegex.Validate(); supervisorRegex.Validate(); jobTitleRegex.Validate(); dutiesRegex.Validate(); hoursRegex.Validate(); wageRegex.Validate(); leavingRegex.Validate(); if((EmployerRequired.IsValid) &amp;&amp; (addressRegEx.IsValid) &amp;&amp; (phoneRegex.IsValid) &amp;&amp; (toDateRegex.IsValid) &amp;&amp; (toDateRegex.IsValid) &amp;&amp; (fromDateRegex.IsValid)&amp;&amp; (supervisorRegex.IsValid)&amp;&amp;(jobTitleRegex.IsValid)&amp;&amp;(dutiesRegex.IsValid)&amp;&amp;(hoursRegex.IsValid)&amp;&amp;(wageRegex.IsValid) &amp;&amp; (leavingRegex.IsValid)) { EmploymentPlaceHolder.Controls.Add(newPanel); } } protected int TotalNumberAddedEmployment { get { return (int)(ViewState["TotalNumberAddedEmployment"] ?? 0); } set { ViewState["TotalNumberAddedEmployment"] = value; } } protected void EmploymentButton_Click(object sender, EventArgs e) { Page.Validate(); if (Page.IsValid) { Button nxtButton = (Button)Wizard1.FindControl("StepNavigationTemplateContainerID$StepNextButton"); nxtButton.Visible = false; return; } else { // Increase the number added and add the new label and textbox TotalNumberAddedEmployment++; addcontrolsemployment(TotalNumberAddedEmployment); Button nxtButton = (Button)Wizard1.FindControl("StepNavigationTemplateContainerID$StepNextButton"); nxtButton.Visible = true; } } protected void ExperienceDropDownList_SelectedIndexChanged(object sender, EventArgs e) { if (ExperienceDropDownList.SelectedValue == "Yes") { Button nxtButton = (Button)Wizard1.FindControl("StepNavigationTemplateContainerID$StepNextButton"); nxtButton.Visible = false; addcontrolsemployment(1); } else { Button nxtButton = (Button)Wizard1.FindControl("StepNavigationTemplateContainerID$StepNextButton"); nxtButton.Visible = true; } } </code></pre>
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