I am using a CustomValidator in ASP.NET as follows.
<asp:CustomValidator ID="AnswerCV" runat="server" ForeColor="Red"
ValidateEmptyText="True" ValidationGroup="test"
OnServerValidate="CustomValidation" ControlToValidate="TextBox1" Enabled="True"
ErrorMessage="You must fill in the text box.">
</asp:CustomValidator>
<asp:TextBox ID="TextBox1" ValidationGroup="test" runat="server">
</asp:TextBox>
<asp:Button runat="server" Id="Button" CausesValidation="True" ValidationGroup="test"
OnClick="Button_Click" />
In the code behind I have
protected void CustomValidation(object sender, ServerValidateEventArgs e)
{
MessageBox.Show("It is firing!!!");
if (string.IsNullOrEmpty(TextBox1.Text))
{
e.IsValid = false;
}
else
{
e.IsValid = true;
}
}
And the button click method is as follows
protected void Button_Click(object sender, EventArgs e)
{
MessageBox.Show("I should not have fired.");
}
The CustomValidation method fires but the Button_Click method fires after that and then the "You must fill in the text box." error message displays. How do I prevent the Button_Click method from firing, when the text box is empty the validation is failing and triggering the error message, but after the Button_click method has fired?
The stackoverflow page here offered other solutions which I have implemented but still the Button_Click method fires.
Aside: And the client side solutions I can not use as I am dynamically going to add code in the Init() method that enables and disables the CustomValidator via a CheckedChanged event in only certain Radio Buttons. End Of Aside
I have also tried the CustomValidator without the OnServerValidate method and I have tried returning a boolean of false from the CustomValidation method cause a syntax error.
protected void Button_Click(object sender, EventArgs e)
{
if (IsValid)
{
Response.Write(" alert ('I should not have fired'); ");
}
}
Please add one if condition in Button_Click Event
protected void Button_Click(object sender, EventArgs e)
{
if (IsValid)
{
Response.Write("<script> alert ('I should not have fired');
</script>");
}
}
Related
<asp:TextBox ID="TextBox2" AutoPostBack="true" runat="server" Width="415px" Height="50px" OnTextChanged="TextBox2_TextChanged"></asp:TextBox>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Save Changes" />
I'm attempting to save the data as such:
protected void TextBox2_TextChanged(object sender, EventArgs e)
{
Session["data"] = TextBox2.Text;
}
And retrieving:
protected void Button1_Click(object sender, EventArgs e)
{
string temp = (string)Session["data"];
}
When i print the string though, I am receiving a white space. Any help would be appreciated. Thanks in advance
In order to store data in Sesstion try something like:
protected void TextBox2_TextChanged(object sender, EventArgs e)
{
Session.Add("data", TextBox2.Text);
}
And no other changes in the retriving part.
As a usage I noticed that when focus is set to text box, the typing cursor is active in text box, the break point in the button's event handler is not hit when pressing the button, so this might be your non functional case.
To get this working after you finish typing into the text box, hit for instance the TAB key and then click on the button and the value from text box is retrived in button's click event handler.
Nothing works, The button doesn't trigger the event
code of button:
<input type="button" id="regBtn" runat="server" onserverclick="RegClick"/>
script code:
<script runat="server">
void RegClick(object sender, EventArgs e)
{
regBtn.Value += "a";
}
</script>
If you use ASP.Net Web Form, you want to use Service Control whenever posting back to server. It will go through Life Cycle Events, and trigger the appropriate event correctly.
<asp:Button ID="SubmitButton" runat="server" Text="Submit" OnClick="SubmitButton_Click"/>
Code Behind
protected void Page_Load(object sender, EventArgs e)
{
}
protected void SubmitButton_Click(object sender, EventArgs e)
{
SubmitButton.Text += "a";
}
I have a Ajax ModalPopupExtender in my page.On a button click currently using TargetControlId i am showing the pop up.My need is when i am clicking the button want to check some conditions from DB.If condition satisfies i want to show the pop up.Other wise no need of pop up.How can i do this?
<ajaxToolkit:ModalPopupExtender CancelControlID="btnCancel" BackgroundCssClass="modalBackground" runat="server" ID="PopupExtender" TargetControlID="btn" PopupControlID="Panel1"></ajaxToolkit:ModalPopupExtender>
protected void ButtonSave_Click(object sender, EventArgs e)
{
if (MyCondition == true)
{
modalPopUpConfirmation.Show();
}
else
{
Label1.Text = "The condition was false, so no modal popup!";
}
}
Try like this
protected void Button1_Click(object sender, EventArgs e)
{
PopupExtender.Show();
}
Call it dynamically.
<!-- Hidden Field -->
<asp:HiddenField ID="hidForModel" runat="server" />
<ajaxToolkit:ModalPopupExtender CancelControlID="btnCancel" BackgroundCssClass="modalBackground" runat="server" ID="PopupExtender" TargetControlID="hidForModel" PopupControlID="Panel1"></ajaxToolkit:ModalPopupExtender>
<asp:Button ID="btnShowPopup" runat="server" Text="Save Data"
OnClick="btnShowPopup_Click" />
Code Behind
protected void btnShowPopup_Click(object sender, EventArgs e)
{
if(Yourcondition)
{
PopupExtender.Show();
}
}
I have a simple windows form app which I have to migrate to run on a webpage, so I'm trying with aspx(c#).
I have two radio buttons, but at time only one of them should be checked. I implemented the very same code from the original app, but it's not working:
protected void RadioButton1_CheckedChanged(object sender, EventArgs e)
{
if (RadioButton1.Checked == true)
{
RadioButton2.Checked = false;
}
}
protected void RadioButton2_CheckedChanged(object sender, EventArgs e)
{
if (RadioButton2.Checked == true)
{
RadioButton1.Checked = false;
}
}
So why these changes not being applied on the page?
you can use GroupName Property of RadioButton Control.
if you set the same GroupName for set of RadioButtons you don't need to write the Code Behid which you have written in the above Post/Question, as only one radio button can be selected from the group.
but if you want to invoke some action like Disabling TextBox on Particular Radio Button click event you can use following sample code.
Example: in this example i'm taking 3 Radio Buttons all set to Same GroupName, hence only one RadioButton canbe selected at a time.
when user selects/checks a RadioButton1 i'm Disabling the TextBox1.
Note : Please Make sure that your RadioButton AutoPostBack Property set to True otherwise events on RadioButton won't be fired.
Design Code:
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:RadioButton ID="RadioButton1" runat="server" Text="DisableTextBox" GroupName="Group1" AutoPostBack="True" OnCheckedChanged="RadioButton1_CheckedChanged"/>
<asp:RadioButton ID="RadioButton2" runat="server" GroupName="Group1" AutoPostBack="True"/>
<asp:RadioButton ID="RadioButton3" runat="server" GroupName="Group1" AutoPostBack="True" />
Code Behind:
protected void RadioButton1_CheckedChanged(object sender, EventArgs e)
{
if (RadioButton1.Checked)
TextBox3.Enabled = false;
else
TextBox3.Enabled = true;
}
Put the checkboxes in a GroubBox or Panel
You can set the GroupName of both radiobuttons the same, so the Code Behind you wrote is not needed anymore.
Also, check out the RadioButtonList
UPDATE
Your aspx-code should look something like this:
<asp:RadioButton id="RadioButtonEnabled" runat="server" Text="Enabled" GroupName="GroupTxtEnabled" AutoPostBack="True" OnCheckedChanged="RadioButtonEnabled_CheckedChanged"/>
<asp:RadioButton id="RadioButtonDisabled" runat="server" Text="Disabled" GroupName="GroupTxtEnabled" AutoPostBack="True"/>
<asp:TextBox id="TextBox1" runat="server"/>
And in your code-behind:
protected void RadioButtonEnabled_CheckedChanged (object sender, EventArgs e)
{
TextBox1 = RadioButtonEnabled.Checked
}
As you can see, I've used the OnCheckedChanged only at one radiobutton, since both radiobuttons are changed at the same time (property GroupName is equal).
I have an asp.net page and on it there are a number of controls, including:
A textbox with autopostback = true and the server side textchanged event implemented
A button with the server side click event implemented
The textbox performs the postback as soon as the user leaves the control (ie, focus is lost). The problem is that if the user happens to change the value and then press the button without leaving the textbox, then on button click the textbox will perform the postback but the button click will be lost.
How can i force both the textbox and the button events to fire consecutively in such cases?
Thanks
Try:
ASPX:
<asp:TextBox ID="TextBox1" clientidmode="Static" runat="server" onkeypress="return EnterEvent(event)"></asp:TextBox>
<asp:Button ID="Button1" runat="server" style="display:none" Text="Button" />
JS:
function EnterEvent(e) {
if (e.keyCode == 13) {
__doPostBack('<%=Button1.UniqueId%>', "");
}
}
CS:
protected void Button1_Click1(object sender, EventArgs e)
{
}
You can delay postback from textbox and cancel it in case of button click. To do this add code below to Page_PreRender method:
protected void Page_PreRender(object sender, EventArgs e)
{
Button1.OnClientClick = string.Format("if(window.{0}Timeout){{ clearTimeout(window.{0}Timeout); }}",
TextBox1.ClientID);
TextBox1.Attributes["onChange"] = string.Format("javascript:window.{0}Timeout = setTimeout(\"{1}\", 500); return;",
TextBox1.ClientID,
ClientScript.GetPostBackEventReference(TextBox1, ""));
}