I have an Id in textbox and I want on behalf of id ,name should be displayed in an below another textbox.I have created an method but don't know where to call it..
Whenever I select the id,the below textbox should automatically be filled with an name of that particular Id..
Please Help me...
You can use code like this:(Double click on textbox at design view)
void textBox1_TextChanged(object sender, EventArgs e)
{
PopulateGrid(textBox1.Text);
}
void PopulateGrid(string queryStr)
{
//here you can write the binding code
}
Related
I'm trying to add a custom control to a panel (containing a "form" to input data) during a button click event and I want to access it's methods like .Validate() after this data has been inputted. But when I try to do so the ctrl comes with null value.
Here's part of my code :
protected void btnNext2_Click(object sender, EventArgs e)
{
...
ctrlCompliance = (Compliance)LoadControl("../../ascx/SRM/Compliance.ascx");
ctrlCompliance.ReadOnly = false;
pnlCompliance.Controls.Add(ctrlCompliance);
...
}
protected void btnNext3_Click(object sender, EventArgs e)
{
...
ctrlCompliance = pnlCompliance.Controls[0] as Compliance;
ctrlCompliance.Validate() <- this is allways null
...
}
I cannot use Page_Init as most of the solutions propose and really need to load it only during that button click. Did someone had the same problem as me?
You should load it anyway using Page_Init, but set its visible property to False. Then using javascript or code-behind you can change its visible property to True when you need to show the print button.
So move:
ctrlCompliance = (Compliance)LoadControl("../../ascx/SRM/Compliance.ascx");
ctrlCompliance.ReadOnly = false;
pnlCompliance.Controls.Add(ctrlCompliance);
to Page_Init
I made researching about this subject I could not find proper answer.
In my default.aspx page, I have a treeview. Codes are in default.aspx like below:
protected void Page_Load(object sender, EventArgs e)
{
}
protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
{
Control ucont;
if (TreeView1.SelectedNode.Value == "Yeni Dönem")
{
ucont = LoadControl("usercontrols/yenidonem.ascx");
PlaceHolder1.Controls.Add(ucont);
}
else
{
ucont = LoadControl("usercontrols/tabloktar.ascx");
PlaceHolder1.Controls.Add(ucont);
}
}
I load user controls dnynmicaly. User controls are have button control. I can not fire user control's button click when I load it dynamcally. How can I solve this ?
Thanks.
First of all, I would not recommend adding control dynamically later than in Page_Load event. Other things to remember is that You should add it on each page load and assign unique ID value the control that does not change between postbacks.
In this case, the easiest way would be to always add both controls to the page and show appropriate one using Visibility property.
If that's not suitable for You, try to move the code from TreeView1_SelectedNodeChanged to the Page_Load event and load appropriate control on each postback until it should be changed to another one.
I haven't tested this, so if You have any issues when using thise answer, let me know in the comments and I'll try to help.
Im trying to do a rather simple practice project and i got stuck for a while now.
I have 3 dropdownlists
and 3 views.
I want to do:
check if the current dropdownlist has chosen a value then that dropdown has a value, hide that view and show the next view.
my problem:
I have one method for all 3 of my dropdownlists that gets called when a change occurs.
I need to check which one of these dropdownlists triggerd the change so that i know which dropdownlist value i need to check(if it is empty or not) and depending on the value i show/hide views.
If more info is needed just ask and Thanks!
On the function you probably have something like
protected void OnChangedEvent(object sender, EventArgs e) {
// code here
}
sender contains the dropdown list that fired the event. So:
protected void OnChangedEvent(object sender, EventArgs e) {
var ddl = (DropDownList)sender;
}
and ddl will be the dropdown list.
I have a small problem. I am developing an online seat reservation system which allow users to click and select seats. I am using buttons for seats. I am writing a method for the button click event for all buttons. I need to know how to identify the id of the button, user clicked. thanks in advance.
When you use a button clicked event, the signature of the method that'll handle the event goes like this:
protected void foo (object sender, EventArgs e)
sender in this case is the button that was clicked. Just cast it to Button again and there you have it. Like this:
Button button = (Button)sender;
string buttonId = button.ID;
You can have all your buttons pointing their Click event to the same method like this.
The first parameter of your event handler (object source or sometimes object sender) is a reference to the button that was clicked. All you need to do is cast it and then you can retrieve the id value, e.g.:
void Button_Click(object sender, EventArgs e)
{
Button button = sender as Button;
if (button != null)
{
//get the id here
}
}
I think there's another way to do this method you may not thought of it,
why don't you put an
Image control
you only need switch the image's color for this method, the first one we assume that it's Red and it means free seat, and the second one is Blue and means taken .
here is a link you may need to know about this issue How to change color of Image at runtime
Hope I could gave you a better idea. thank you
I know this is an old thread but hopefully it helps someone out there having the same trouble I was here in 2019! This is my solution using the Tag property of the button with Binding through XAML. Worked great for me, even though it might be a little hacky:
In your button click event:
private void Button_Click(object sender, RoutedEventArgs e)
{
Button EditButton = (Button)e.Source;
int id = Convert.ToInt32(EditButton.Tag);
//do your stuff
}
In your XAML:
<Button Click="Button_Click" Content="Edit" Tag="{Binding whateverInt}" />
I have a user control, which is added to another user control. The nested user control is built up of a GridView, an image button and a link button. The nested user control is added to the outer control as a collection object based upon the results bound to the GridView.
The problem that I have is that my link button doesn't work. I click on it and the event doesn't fire. Even adding a break point was not reached. As the nested user control is added a number of times, I have set image button to have unique ids and also the link button. Whilst image button works correctly with its JavaScript. The link button needs to fire an event in the code behind, but despite all my efforts, I can't make it work. I am adding the link button to the control dynamically. Below is the relevant code that I am using:
public partial class ucCustomerDetails : System.Web.UI.UserControl
{
public event EventHandler ViewAllClicked;
protected override void CreateChildControls( )
{
base.CreateChildControls( );
string strUniqueID = lnkShowAllCust.UniqueID;
strUniqueID = strUniqueID.Replace('$','_');
this.lnkShowAllCust.ID = strUniqueID;
this.lnkShowAllCust.Click += new EventHandler(this.lnkShowAllCust_Click);
this.Controls.Add(lnkShowAllCust);
}
protected override void OnInit (EventArgs e)
{
CreateChildControls( );
base.OnInit(e);
}
protected override void OnLoad(EventArgs e)
{
base.EnsureChildControls( );
}
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
{
CreateChildControls( );
}
}
protected void lnkShowAllCust_Click(object sender, EventArgs e)
{
this.OnCustShowAllClicked(new EventArgs ( ));
}
protected virtual void OnCustShowAllClicked(EventArgs args)
{
if (this.ViewAllClicked != null)
{
this.ViewAllClicked(this, args);
}
}
}
I have been stuggling with this problem for the last 3 days and have had no success with it, and I really do need some help.
Can anyone please help me?
My LinkButton wasn't firing it's Click event, and the reason was I had its CausesValidation property set to True. If you don't want the link to validate the form, be sure to set this to False.
Try adding your click event to the linkbutton tag:
<asp:LinkButton runat="server" OnClick="linkShowAllCust_Click" />
Or adding it to your Page_Load:
Page_Load(object sender, EventArgs e)
{
this.lnkShowAllCust.Click += new EventHandler(this.lnkShowAllCust_Click);
}
Is the usercontrol within the gridview? If so register the event handler on the gridview's onrowcreated event.
It appears that you have a viewstate issue. Because the control isn't there when the viewstate is loaded the application doesn't know how to hook up the event to be fired. Here is how to work around this.
You can actually make your app work like normal by loading the control tree right after the loadviewstateevent is fired. if you override the loadviewstate event, call mybase.loadviewstate and then put your own code to regenerate the controls right after it, the values for those controls will be available on page load. In one of my apps I use a viewstate field to hold the ID or the array info that can be used to recreate those controls.
Protected Overrides Sub LoadViewState(ByVal savedState As Object)
MyBase.LoadViewState(savedState)
If IsPostBack Then
CreateMyControls()
End If
End Sub
I had the same issue. I had viewstate="false" on the page I was adding the control to. (on the aspx page)