I have two boxes one with username [text] and one with password [password].
I'm using this code in the CodeBehind:
protected void Button2_Click1(object sender, EventArgs e)
{
TextBox1.Text = "";
TextBox2.Text = "";
}
[asp.net/html]
<asp:TextBox ID="TextBox2" runat="server" Height="24px" Style="text-align: center" Width="209px" TextMode="Password"></asp:TextBox>
The first text box clears but the second doesn't. Is there a special way to do this in ASP.NET?
Hi I don't know what happend in your HTML but I wrote this:
<asp:TextBox ID="TextBox1" runat="server" ></asp:TextBox>
<asp:TextBox ID="TextBox2" runat="server" Height="24px" Style="text-align: center" Width="209px" TextMode="Password"></asp:TextBox>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
And the codebehind:
protected void Button1_Click(object sender, EventArgs e)
{
TextBox1.Text = "";
TextBox2.Text = "";
}
And It works, the only thing is when the button does not have the onclick only It will clean the password texbox, check it and maybe this is your problem.
When the TextMode property of the <asp:TextBox /> is set to Password the value set in the Text property will not display at runtime, Or you can say it won't have any effect to set the Text property. This is by design to prevent the unmasked password from being displayed in the HTML source of the page.
As a solution, use this::
this.TextBox2.Attributes["value"] = "";
OR::
this.TextBox2.Attributes.Add("value", "");
Check here for full details.
textbox1.text = string.empty;
textbox2.text = string.empty;
Related
<asp:repeater id="rpt" run="server">
<ItemTemplate>
<asp:LinkButton id="Delete" runat="server" OnCommand="Delete_Command"></asp:linkButton>
<asp:label id="lblMessage" run="server">
</ItemTemplate>
</asp:repeater>
Code Behind:
protected void Delete_Command(object sender, CommandEventArgument e)
{
}
how i get the reference to the "lblMessage" in Delete_Command.
Try this:
protected void Delete_Command(object sender, CommandEventArgs e)
{
LinkButton button = (LinkButton)sender;
Label label = (Label)button.NamingContainer.FindControl("lblMessage");
// do something with the label
}
If you:
Have bound the repeater
Have ViewState enabled
Do not re-bind the repeater earlier in the post back
this should work. If not, please verify that the id of the label is indeed exactly the same as in the ...FindControl("lblMessage");. Also make sure that runat="server" is set on all the controls involved.
Edit: One more thing to check: Search the markup file (the .aspx file) and check if there are any other controls that also use the same event in the code behind. If another control is using the same event handler and that control is not in the repeater, the label will not be found.
means are you want find a lable in Delete_Command event?
in aspx
<asp:Repeater ID="rpt" runat="server">
<ItemTemplate>
<asp:LinkButton ID="Delete" runat="server" OnCommand="Delete_Command"></asp:LinkButton>
<asp:Label ID="lblMessage" run="server">
</ItemTemplate>
</asp:Repeater>
in aspx.cs
protected void Delete_Command(object sender, CommandEventArgs e)
{
foreach (RepeaterItem item in rpt.Items)
{
Label lblMessage = item.FindControl("lblMessage") as Label;
if (lblMessage != null)
{
lblMessage.Text = "";
}
}
}
If You want to make it in your way use following code in
protected void Repeater1_ItemCommand(object source, CommandEventArgs e)
{
(((LinkButton)source).NamingContainer).FindControl("lblName")
}
Another approach.. But something that you can buy
aspx
<asp:Repeater ID="Repeater1" runat="server"
onitemcommand="Repeater1_ItemCommand">
<ItemTemplate>
<asp:Label ID="lblName" runat="server" Text='<%=Eval("Name") %>' ></asp:Label>
<asp:LinkButton runat="server" CommandName="Delete_Command" Text="sd"></asp:LinkButton>
</ItemTemplate>
</asp:Repeater>
.cs
protected void Delete_Command(object sender, CommandEventArgument e)
{
if(e.CommandName != null)// Conditional Check
{
Label label = e.Item.FindControl("lblMessage");
// do something with the label
}
}
I wanted to disable asp.net validation server controls from browser. I checked online but did not find any way to disable the server side validation; it can be disabled only on the client side using JS/jQuery.
Here is the scenario: I have a checkbox and selecting which displays a set of text boxes. Only if the checkbox is checked, required field validator should fire for the text boxes. I don't want to call a postback on checkbox. Actually those chceck boxes will be generated with jQuery templating so postback is not an option to enable disable validtion.
I would like to know whether there is any way we can enable disable the .CausesValidation property for the controls from browser using some setting? Or is there a way to capture the controls which are to be considered for validation slectively in some event before page_load?
[Update]
Based on Accepted answer, here is my solution:
<form id="form1" runat="server">
<div>
<asp:TextBox ID="textbox1" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="req1" ControlToValidate="textbox1" runat="server"
ErrorMessage="enter text"></asp:RequiredFieldValidator>
<asp:TextBox ID="textbox2" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="req2" ControlToValidate="textbox2" runat="server"
ErrorMessage="enter text for 2"></asp:RequiredFieldValidator>
<asp:CheckBox ID="check1" runat="server" Text="choose" />
<asp:Button ID="submitBtn" runat="server" OnClick="submitBtn_Click" Text="submit" />
<asp:CustomValidator ID="cvBox" runat="server" ErrorMessage="Error" ValidationGroup="prueba"
OnServerValidate="Validarcaja"></asp:CustomValidator>
<asp:ValidationSummary ID="summary" runat="server" />
</div>
</form>
protected void Page_Load(object sender, EventArgs e)
{
req1.Enabled = false;
req2.Enabled = false;
}
protected void submitBtn_Click(object sender, EventArgs e)
{
if (Page.IsPostBack)
{
Page.Validate();
if (Page.IsValid)
{
Response.Write("valid form");
}
else
{
Response.Write("invalid form");
}
}
}
protected void Validarcaja(object source, ServerValidateEventArgs args)
{
if (check1.Checked)
{
req1.Enabled = true;
req1.Validate();
}
}
The solution for me would be to use a CustomValidator with a OnServerValidate method.
In the OnServerValidate method I would check if the checkbox is checked, in that case I would verify if the textboxes are filled. It is not necessary to do any change in the CausesValidation property.
The only condition is not to include the property "ControlToValidate". A CustomValidator does not fire if the textbox is empty that's why.
So the code would be like this:
<asp:ValidationSummary ID="vs" runat="server" ValidationGroup="prueba" />
<asp:CheckBox ID="chb" runat="server" Text="Check" />
<asp:TextBox ID="txbBox" runat="server"></asp:TextBox>
<asp:CustomValidator ID="cvBox" runat="server" ErrorMessage="Error" ValidationGroup="prueba"
OnServerValidate="Validarcaja"></asp:CustomValidator>
<asp:Button ID="btn" runat="server" Text="Prueba" />
And the codebehind:
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
{
Page.Validate();
}
}
protected void Validarcaja(object source, ServerValidateEventArgs args)
{
if (chb.Checked)
{
if (txbBox.Text == String.Empty)
{
cvBox.IsValid = false;
}
}
}
I posted a number of bugs on Microsoft site and while they were real bugs, MSFT will close it as design [And I figured most people favour MSFT anyways]. Here is one that I am sure they will clasify as by design but to me this is a serious bug.
This is all I have in ASPX page (NET 3.5).
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Submit" /><br />
<asp:Label ID="lblOutput" runat="server" Text="Label"></asp:Label>
Codebehind
protected void Page_Load(object sender, EventArgs e)
{ /* this works */
if (IsPostBack)
{
string txt = string.Empty;
txt = Request.Params["TextBox1"];
lblOutput.Text = "You entered : " + txt;
}
}
protected void Button1_Click(object sender, EventArgs e)
{ /* this does not */
string txt = string.Empty;
txt = Request.Params["TextBox1"];
lblOutput.Text = "You entered : " + txt;
}
Now if you include another simple HTML textbox (Not ASP) like this
<input type="text" id="mytextbox" name="mytextbox" /> // still it below the existing one
txt = Request.Params["mytextbox"]; // change to this line instead of TextBox1
Then it works in both places.
protected void Button1_Click(object sender, EventArgs e)
{ /* Now this works which is weird but it does */
If(IsPostback)
{
string txt = string.Empty;
txt = Request.Params["TextBox1"];
lblOutput.Text = "You entered : " + txt;
}
}
I therefore should close the question.
If you are forced to use the Request object instead normal asp:* controls, use it like this:
txt = Request["TextBox1"];
It will check all the HttpRequest collections.
The QueryString, Form, Cookies, or ServerVariables collection member
specified in the key parameter. If the specified key is not found,
then null is returned.
That is really fundamental stuff you're doing in that example, so I highly doubt it's a bug. From the example, it looks like you're going against the grain:
Markup
<asp:PlaceHolder ID="PlaceHolder1" runat="server">
<asp:TextBox ID="TextBox1" runat="server" />
<asp:TextBox ID="TextBox2" runat="server" />
<asp:TextBox ID="TextBox3" runat="server" />
<asp:TextBox ID="TextBox4" runat="server" />
...
</asp:PlaceHolder>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Submit" /><br />
<asp:Label ID="lblOutput" runat="server" Text="Label"></asp:Label>
Code-behind
protected void Button1_Click(object sender, EventArgs e)
{
foreach (TextBox txtCtrl in PlaceHolder1.Controls.OfType<TextBox>())
{
//append the textbox value to the label
lblOutput.Text += String.Format("{0}<br/>", txtCtrl.Text);
}
}
protected void Button1_Click(object sender, EventArgs e)
{
List<TextBox> txtList = PlaceHolder1.Controls.OfType<TextBox>().ToList();
for (int ctrlIndex = 0; ctrlIndex < txtList.Count; ctrlIndex++)
{
TextBox txtCtrl = txtList.ElementAt(ctrlIndex);
if (txtCtrl != null)
{
lblOutput.Text += String.Format("{0}<br/>", txtCtrl.Text);
}
}
}
I am experiencing a problem with an ASPX page not executing a CustomValidator. The Page consists of 3 ASP Panels which swap visibility for each step in a 3 step process. The first step/panel functions as expected, executing all CustomValidators when I click the submit button. If valid, the button click hides its panel and shows the second panel for step #2 which contains another CustomValidator. When clicking the submit button on this second panel, the CustomValidator never executes and the Page always reports that it IsValid.
I have reproduced this behavior in a small, example app. Here is the relevant code...
Default.aspx
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<h2>
Welcome to ASP.NET!
</h2>
<p>
To learn more about ASP.NET visit www.asp.net.
</p>
<p>
You can also find <a href="http://go.microsoft.com/fwlink/?LinkID=152368&clcid=0x409"
title="MSDN ASP.NET Docs">documentation on ASP.NET at MSDN</a>.
</p>
<asp:Panel ID="Panel1" runat="server" Visible="true">
<div>
<asp:CustomValidator
ID="CustomValidator1"
runat="server"
ControlToValidate="TextBox1"
ValidateEmptyText="true"
Display="Dynamic"
OnServerValidate="CustomValidator1_ServerValidate">
</asp:CustomValidator>
</div>
<div>
<asp:Label ID="Label1" runat="server" Text="Type in anything:" AssociatedControlID="TextBox1" />
<asp:TextBox ID="TextBox1" runat="server" />
</div>
<div>
<asp:Button ID="Button1" runat="server" Text="Show Panel #2" OnClick="Button1_Click" />
</div>
</asp:Panel>
<asp:Panel ID="Panel2" runat="server" Visible="false">
<div>
<asp:CustomValidator
ID="CustomValidator2"
runat="server"
Display="Dynamic"
OnServerValidate="CustomValidator2_ServerValidate">
</asp:CustomValidator>
</div>
<div>
<asp:Button ID="Button2" runat="server" Text="I should cause an Exception..." OnClick="Button2_Click" />
</div>
</asp:Panel>
<asp:Panel ID="Panel3" runat="server" Visible="false">
<p>An exception should have been thrown. :(</p>
</asp:Panel>
</asp:Content>
Default.aspx.cs
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Panel1.Visible = true;
Panel2.Visible = false;
Panel3.Visible = false;
}
protected void Button1_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
Panel1.Visible = false;
Panel2.Visible = true;
Panel3.Visible = false;
}
}
protected void Button2_Click(object sender, EventArgs e)
{
if (Page.IsValid)
{
Panel1.Visible = false;
Panel2.Visible = false;
Panel3.Visible = true;
}
}
protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
{
string userEnteredText = TextBox1.Text;
if (string.IsNullOrEmpty(userEnteredText))
{
CustomValidator1.Text = "Text is required!";
args.IsValid = false;
}
else if (!userEnteredText.ToLower().Equals("anything"))
{
CustomValidator1.Text = "You didn't type 'anything'! ;)";
TextBox1.Text = null;
args.IsValid = false;
}
else
{
args.IsValid = true;
}
}
protected void CustomValidator2_ServerValidate(object source, ServerValidateEventArgs args)
{
throw new Exception("This ServerValidate() method never triggers!");
}
}
I don't understand why the CustomValidator2 method is never executing. Can anyone explain this behaviour?
As you're not setting the ControlToValidate property in your scenario set the property ValidateWhenEmpty to true on the CustomValidator.
The CustomValidator will not be evaluated when the ControlToValidate is blank unless ValidateWhenEmpty is true.
UPDATE:
Ok this was wrong. But do you really need to set visibility of the panels in the Page_Load? You've done it already declaratively in the .aspx.
If you remove it from Page_Load, the validator works. I suppose it does not work if the validator is Visible=false or is inside a containing control that is Visible=false.
You should use ValidationGroup property of the buttons and the corresponding validation controls in each panel.
I have a repeater control and textbox in that repeater. I want a required field validator in the textbox ho can i do this
<asp:Repeater id="myRep" OnItemDataBound="rep_ItemDataBound" runat="server">
<ItemTemplate>
<asp:TextBox id="tx" runat="server" />
<asp:RequiredFieldValidator id="myVal" ControlToValidate="tx" ErrorMessage="Required" runat="server" />
</ItemTemplate>
</asp:Repeater>
UPDATE
Add this to code-behind (also modify the markup a bit to subscribe to an event, see above):
protected void rep_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
RequiredFieldValidator val = (RequiredFieldValidator)e.Item.FindControl("myVal");
TextBox tb = (TextBox)e.Item.FindControl("tx");
val.ControlToValidate = tb.ID;
}
If you want all textboxes in a repeater to be validated by a single button click then thats simple like this
<asp:Repeater ID="rpt" runat="server">
<ItemTemplate>
<asp:TextBox ID="txt" runat="server">
</asp:TextBox>
<asp:RequiredFieldValidator ID="rqf" ControlToValidate="txt"
ErrorMessage="*" ValidationGroup = "TestValidationGroup" runat = "server">
</asp:RequiredFieldValidator>
</ItemTemplate>
</asp:Repeater>
<asp:Button ID = "btnSubmit" runat = "server" ValidationGroup = "TestValidationGroup" />
No need to check for any event for databound or anything.
You can set ControlToValidate value on repeater itemdatabound.
Try this one
<asp:Repeater ID="rptSample" runat="server">
<ItemTemplate>
Name:<br />
<asp:TextBox ID="txtName" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvName" ControlToValidate="txtName" runat="server" Display="Static" ErrorMessage="Name field cannot be left blank"></asp:RequiredFieldValidator>
</ItemTemplate>
</asp:Repeater>
<br />
<asp:Button ID="btnSubmit" Text="Submit" runat="server" />
protected void myRep_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
((RequiredFieldValidator)e.Item.FindControl("myVal")).ValidationGroup = ((TextBox)e.Item.FindControl("tx")).UniqueID;
}
}
protected void Repeater_OnItemDataBound(object sender, RepeaterItemEventArgs e) {
tblData tbldata = e.Item.DataItem as tblData;
RequiredFieldValidator val = (RequiredFieldValidator)e.Item.FindControl("rfv");
if (tbldata.FieldName.ToUpper().Contains("NOT NULL")) {
TextBox tb = (TextBox)e.Item.FindControl("txtDATFieldName");
val.ControlToValidate = tb.ID;
}
else {
val.Enabled = false; // disable when you dont need a validator
}
}
Maybe you want have a validation per row... Set the validation group to a group per row like this
ValidationGroup='<%# "gropname" + Eval("Id") %>'
do this in the validator, textbox and the button
HTH
G.
I kept getting a duplicate key exception in RegisterExpandoAttribute trying to do this.
I was using a UserControl inside a repeater, when "OnDataBinding" instead of "ItemDataBinding"
This worked for me:
/// <summary>
/// Raises the <see cref="E:System.Web.UI.Control.DataBinding" /> event.
/// </summary>
/// <param name="e">An <see cref="T:System.EventArgs" /> object that contains the event data.</param>
protected override void OnDataBinding(EventArgs e)
{
base.OnDataBinding(e);
foreach (Control ct in this.Controls)
{
BaseValidator bv = ct as BaseValidator;
if (null == bv)
{
continue;
}
bv.ControlToValidate = this.FindControl(bv.ControlToValidate).ID;
bv.ValidationGroup = this.ValidationGroup;
}
}
And yes, I don't think it makes any sense either