i have one text box beside which there is one date picker and one dropdownlist in one user control which i'm using in one aspx page.I want to enable the regular field validator of the dropdownlist if we select the date from the datepicker in the textbox otherwise it should it should be false.
So how i should go ??
Would something basically like this work for you:
Markup:
<asp:TextBox ID="MyTextBox" runat="server" AutoPostBack="true"
OnTextChanged="MyTextBox_TextChanged">
<asp:RegularExpressionValidator ID="MyValidator" runat=server
ControlToValidate="MyTextBox"
ErrorMessage="Must be in correct format"
ValidationExpression="[a-zA-Z]" /><!-- use whatever regex you need here -->
Code behind:
protected void MyTextBox_TextChanged(object sender, System.EventArgs e)
{
MyValidator.IsEnabled = !String.IsNullOrEmpty(MyTextBox.Text);
}
Related
I'm using an aspx file as my main page with the following code snippet:
<input type="text" runat="server" id="Password" />
<asp:Button runat="server" id="SavePassword"
Text="Save" OnClick="SavePassword_Click"/>
Then in the code behind I use:
protected void SavePassword_Click(object sender, EventArgs e)
{
string a = Password.Value.ToString();
}
Setting Password.Value in the Page_Load works as expected, but setting a to the value results in an empty string in a regardless what I type in on the page befoere I click the save button.
Am I overlooking here something?
You should add label field with name labelShow in aspx page like this
<asp:Label ID="labelShow" runat="server"></asp:Label>
Then add the string into .cs file
protected void SavePassword_Click(object sender, EventArgs e)
{
string a = Password.Value.ToString();
labelShow.Text = a.ToString();
}
I can figure several errors :
You say something about Page_Load. You should always remember Page_Load is executed at every postback. So if you write something into the textbox at Page_Load, it will erase the value typed by user. You can change this behavior by veriyfing
if(!IsPostBack)
{
// Your code
}
around your Page_Load content.
input runat="server" is not the proper way to do TextBox in ASP.Net, in most cases you should use asp:TextBox
You don't do anything with your "a" string, your current code sample does nothing, whether the Password field is properly posted or not. You can do as suggested by Ravi in his answer to display it.
I suggest you to to learn how to use VS debugger, and to read a good course on ASP.Net Webforms to learn it.
How do I call server side code for textbox's in asp.net when user presses enter key? Code behnid method is creating a dynamic control based upon a LINQ query from data table.
The textbox has a TextChanged event that will fire when the focus leaves the textbox. If this isn't good enough for you, your going to need to use javascript and the onkeypress event.
As there's no description of what your doing after the event, I'm not sure what to offer as sample code.
In my opinion OP want to submit data with pressing enter in the textbox, then do sth with string from textbox.
So if I understand it right here is solution to do this:
//aspx
<asp:Panel ID="pnlSubmit" runat="server" DefaultButton="btnSubmit">
<asp:TextBox runat="server" ID = "txbText"></asp:TextBox>
<asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" />
</asp:Panel>
//aspx.cs
protected void btnSubmit_Click(object sender, EventArgs e)
{
string textFromTextBox = txbText.Text;
//do sth with that string
}
I want to set the textbox contol located in the panel control via code
I know to retrieve the inputted value in the textbox control:
string myVal = Request.Form["txtResult"];
I want to set the txtResult.text = "some text";
makeup snippet:
<asp:Panel ID="Panel1" runat="server" Style="display: none" Width="233px">
<asp:TextBox ID="txtResult" runat="server" AutoPostBack="True"></asp:TextBox>
<br />
<div align="center">
<asp:Button ID="OkButton" runat="server" Text="OK" />
<asp:Button ID="CancelButton" runat="server" Text="Cancel" />
</div>
</asp:Panel>
txtResult is not available within code, I tried to see if it is available in the page_load, it's not
texReults was a typo, its txtResult, I updated the ID
the intellisense does not recognize any cntr by the name txtResult
its a new web application and the panel visibility=True
maybee this wil help, above the snipet, I use ScriptManager from the AJAX Exstension
I am aware of he Asnchronius affects, partial potback, etc.
It's a managed control, you should be able to set it on the Page_Load event:
protected void Page_Load(object sender, System.EventArgs e)
{
txtResult.Text = "some text";
}
Update: Based on your update, there are a couple of things that you would need to check:
Spelling: Are you sure you're spelling the control name correctly?
Its ID in your code is "txtResults", but you're referencing it as
"txtResult".
Designer: Did you copy the aspx page or bypass VS in some way for this page? If so check the .designer file for the reference to the control: i.e. "Page1.aspx.designer.cs"
Visibility: Is the Panel control's visibility set to true? If not, then it won't render the controls that are contained within it.
Update 2: If you're doing this through scriptmanager, then I highly recommend that you read through this: http://www.wrox.com/WileyCDA/Section/Using-the-ASP-NET-AJAX-ScriptManager.id-305492.html
I am using an ASP.NET AJAX Masked Edit Extender to format phone numbers
<asp:TextBox ID="tbPhoneNumber" runat="server" />
<ajaxToolkit:MaskedEditExtender TargetControlID="tbPhoneNumber" Mask="(999)999-9999" MaskType="Number"
InputDirection="LeftToRight" ClearMaskOnLostFocus="false" ClearTextOnInvalid="false" runat="server" AutoComplete="false" />
On the page load event I am trying to populate the phone textbox as follows:
protected void Page_Load(object sender, EventArgs e)
{
tbPhoneNumber.Text = "(394)456-310";
}
So there is one number which is missing at the end to make it a valid phone number. When the page loads I expected the value in the textbox to be (394)456-310_ But it displays (_39)445-6310 Why is this happening?
Take a look at the following Question:
Databinding int32 to MaskedEditExtender enabled TextBox
This seems to be a common issue.
I have a asp:GridView which contains a asp:TextBox within a TemplateField. I would like to obtain it's ID for use in javascript. Something like this:
<asp:TemplateField>
<ItemTemplate>
<asp:TextBox ID="textDateSent" runat="server" />
<input type="button" value='Today'
onclick="setToday('<%# textDateSent.ClientID %>');" />
</ItemTemplate>
</asp:TemplateField>
But when I compile, I get an error:
The name 'textDateSent' does not exist in the current context
Anybody know how to get the client ID of this TextBox?
Try this:
<asp:TemplateField>
<ItemTemplate>
<asp:TextBox ID="textDateSent" runat="server">
</asp:TextBox>
<input type="button" value='Today' onclick="setToday('<%# ((GridViewRow)Container).FindControl("textDateSent").ClientID %>');" />
</ItemTemplate>
</asp:TemplateField>
Maybe you don't want to do it where you need the ClientID. Check out this post here where the controls in a row are referenced in a generic way.
Change <%# textDateSent.ClientID %> to <%= textDateSent.ClientID %>.
Argh, you may need to use the OnDataBinding event of the grid view. Then put a literal control in your javascript. Then you can get the clientID of the text box and feed that into your literal control.
protected void GridViewName_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
//Create an instance of the datarow
DataRowView rowData = (DataRowView)e.Row.DataItem;
//locate your text box
//locate your literal control
//insert the clientID of the textbox into the literal control
}
}
Look here for a great detailed tutorial on working within this context.
You can get client id like this:
protected void Gv_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
string strClientID = ((TextBox)e.Row.FindControl("txtName")).ClientID;
}
}
This will give unique client ID for each textbox in all rows.
I just do this...
var tbl = document.getElementById('<%=GridView.ClientID%>');
var checkBox = tbl.rows[i].cells[11].getElementsByTagName("input")[0].id;
the cell should always be the same and it gets rendered into an input. You may have to change the number at the end if you have more then one input in that cell. This will give you the new clientid/id of the input object (checkbox or whatever)
This is what I did. In the aspx page I just passed the entire object to the javascript function, so I didn't even meed to client id. In my case the object was a drop down list in the EditItemTemplate of the GridView. I added an html onchange(this) event in the aspx code.
<asp:DropDownList ID="custReqRegionsDDL" runat="server" onchange='custReqRegionsDDLOnChange(this)'>
</asp:DropDownList>
here is my javascript
function custReqRegionsDDLOnChange(myDDL)
{
alert('selected text=' + myDDL.options[myDDL.selectedIndex].text);
}