好吧，我已经处理这个问题两天了，我还没有解决这个问题。我想用 RegularExpressionValidation 验证文本框。
- 用户从 Dropbox 中选择是或否
- 如果是，则他们单击按钮以打开输入表单
- 填写 texbox，并非全部都是必需的，但如果他们确实填写了日期，那么它必须采用正确的格式。
- 如果有效，向导上的下一步按钮将再次可见，并且将显示一组新的文本框。注意：下一个按钮出现的唯一时间是一切都有效。
我的主要问题是我希望它只验证这个向导步骤而不是整个“页面”
每当我单击按钮时，我都会不断收到错误消息，但它可能来自正则表达式。证实（）：
System.NullReferenceException：对象引用未设置为对象的实例。
Source Error:
Line 590:
Line 591:
Line 592: addressRegEx.Validate(); <---Whats in red
Line 593: EmployerRequired.Validate();
Line 594: phoneRegex.Validate();
C＃：
protected void Page_Load(object sender, EventArgs e)
{
for (int i = 0; i < 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}(?=(?<1>,)|(?<1>))(\k<1>\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("<br />"));
//newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(new LiteralControl("<table border='2px'><tr>"));
newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(new LiteralControl("<td class='title-text' >"));
newPanel.Controls.Add(employerLabel);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text'width='180px' colspan='2'>"));
newPanel.Controls.Add(employerTextbox);
newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(EmployerRequired);
newPanel.Controls.Add(new LiteralControl("</td></tr><tr><td class='title-text' >"));
newPanel.Controls.Add(addressLabel);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text'>"));
newPanel.Controls.Add(addressTextbox);
newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(addressRegEx);
newPanel.Controls.Add(new LiteralControl("</td>"));
newPanel.Controls.Add(new LiteralControl("<td class='title-text'>"));
newPanel.Controls.Add(phoneLabel);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text'>"));
newPanel.Controls.Add(phoneTextbox);
newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(phoneRegex);
newPanel.Controls.Add(new LiteralControl("</td></tr><tr><td class='title-text'>"));
newPanel.Controls.Add(fromDateLabel);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text'>"));
newPanel.Controls.Add(fromDateTextbox);
newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(fromDateRegex);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text'>"));
newPanel.Controls.Add(toDateLabel);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text'>"));
newPanel.Controls.Add(toDateTextbox);
newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(toDateRegex);
newPanel.Controls.Add(new LiteralControl("</td></tr><tr><td class='title-text'>"));
newPanel.Controls.Add(supervisorLabel);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text'>"));
newPanel.Controls.Add(supervisorTextbox);
newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(supervisorRegex);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text'>"));
newPanel.Controls.Add(jobTitleLabel);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text'>"));
newPanel.Controls.Add(jobTitleTextbox);
newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(jobTitleRegex);
newPanel.Controls.Add(new LiteralControl("</td></tr><tr><td class='title-text'>"));
newPanel.Controls.Add(dutiesLabel);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text' colspan='2'>"));
newPanel.Controls.Add(dutiesTextbox);//next to it
newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(dutiesRegex);
newPanel.Controls.Add(new LiteralControl("</td></tr><tr><td class='title-text'>"));
newPanel.Controls.Add(hoursLabel);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text'>"));
newPanel.Controls.Add(hoursTextbox);
newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(hoursRegex);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text'>"));
newPanel.Controls.Add(wageLabel);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text'>"));
newPanel.Controls.Add(wageTextbox);
newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(hoursRegex);
newPanel.Controls.Add(new LiteralControl("</td></tr><tr><td class='title-text'>"));
newPanel.Controls.Add(leavingLabel);
newPanel.Controls.Add(new LiteralControl("</td><td class='title-text' colspan='2'>"));
newPanel.Controls.Add(leavingTextbox); // next to it
newPanel.Controls.Add(new LiteralControl("<br />"));
newPanel.Controls.Add(leavingRegex);
newPanel.Controls.Add(new LiteralControl("</td></tr></table><br /><hr>"));
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) && (addressRegEx.IsValid) && (phoneRegex.IsValid) && (toDateRegex.IsValid) && (toDateRegex.IsValid) && (fromDateRegex.IsValid)&& (supervisorRegex.IsValid)&&(jobTitleRegex.IsValid)&&(dutiesRegex.IsValid)&&(hoursRegex.IsValid)&&(wageRegex.IsValid) && (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;
}
}