I have a FormView on my WebPage and I am trying to get the FormView when my Submit button is pressed inside the FormView's InsertItemTemplate. How can I do that. My sender of the event is the button but not the FormView. Is there any property for it?
You should be able to access FV directly via it's ID in the ButtonClick.
protected void Button1_Click(object sender, EventArgs e)
{
string id = FormView1.ID;
//Here is an explicit way to do get FV
//FormView fv = (FormView)((Button)sender).NamingContainer;
}
Related
I have DropDownList inside my ASP page.
When selection changed postback accured and the Page_Load method fired.
I need to get selected item(selectedValue and selectedIndex) in Page_Load method.
I know that I can use selectedIndexChanged event handler, but in my case it is not
suitable solution because of incorrect architecture.
Any idea how to get selected item in DropDownList control in Page_Load method.
With incorrect architecture is it useful to write
var selectedValue = Request.Params[drpDownList.UniqueID];
You should be OK as long as you check for postback -
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
{
var index = ddlDropDown.SelectedIndex;
// do stuff
}
}
I'm assuming that the control isn't dynamically created.
I have a telerik radgrid in my .aspx page name rgLowRise, and I have an ObjectDataSource as the DataSource set like rgLowRise.DataSourceID = odsLowRise. This works fine, but I want it not to show any records at first load, how can I do that? And I have to use DataSourceID and not DataSource due to some reasons.
Thanks
You can remove the DataSourceID from the markup or your code behind (Page_Load) and set at a later stage, e.g. Button_Click or some other event
protected void Button_Click(object sender, EventArgs e)
{
rgLowRise.DataSourceID = odsLowRise; //until you click this button, the grid would display nothing
}
What I am trying to do is to access the value from the TextBox1 to display back on the screen.
I tried to access it from the Page_Load() and the OnItemDataBound and they both failed.
It seem like the code is able to access the control but it return nothing back.
protected void Page_Load(object sender, EventArgs e)
{
Literal Literal1 = (Literal)Repeater1.Controls[Repeater1.Controls.Count - 1].FindControl("Literal1");
Response.Write(Literal1.Text);
//this techique is not working for the line below
TextBox TextBox1 = (TextBox)Repeater1.Controls[Repeater1.Controls.Count - 1].FindControl("TextBox1");
Response.Write(TextBox1.Text);
}
public void myRepeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
//this techique is not working
if (e.Item.ItemType == ListItemType.Footer)
{
TextBox TextBox1 = (TextBox)e.Item.FindControl("TextBox1");
Response.Write(TextBox1.Text);
}
}
I'm not sure what you mean by "they both failed" but if the Text property of the Textbox is empty i might be because you are rebinding your repeater on each post back. Try wrapping your repeater .DataBind() with a !IsPostBack condition.
I have to use "Literal" as an alternate solution by passing the html Textbox problem. I do not like this solution but i guess i have to use it.
I have a PlaceHolder control inside of a ListView that I am using to render controls from my code behind. The code below adds the controls:
TextBox tb = new TextBox();
tb.Text = quest.Value;
tb.ID = quest.ShortName.Replace(" ", "");
((PlaceHolder)e.Item.FindControl("ph_QuestionInput")).Controls.Add(tb);
I am using the following code to retrieve the values that have been entered into the TextBox:
foreach (ListViewDataItem di in lv_Questions.Items)
{
int QuestionId = Convert.ToInt32(((HiddenField)di.FindControl("hf_QuestionId")).Value);
Question quest = dc.Questions.Single(q => q.QuestionId == QuestionId);
TextBox tb = ((TextBox)di.FindControl(quest.ShortName.Replace(" ","")));
//tb is always null!
}
But it never finds the control. I've looked at the source code for the page and the control i want has the id:
ctl00_cphContentMiddle_lv_Questions_ctrl0_Numberofacres
For some reason when I look at the controls in the ListViewDataItem it has the ClientID:
ctl00_cphContentMiddle_lv_Questions_ctrl0_ctl00
Why would it be changing Numberofacres to ctl00? Is there any way to work around this?
UPDATE:
Just to clarify, I am databinding my ListView in the Page_Init event. I then create the controls in the ItemBound event for my ListView. But based on what #Womp and MSDN are saying the controls won't actually be created until after the Load event (which is after the Page_Init event) and therefore are not in ViewState? Does this sound correct?
If so am I just SOL when it comes to retrieving the values in my dynamic controls from my OnClick event?
UPDATE 2:
So i changed the code i had in my Page_Init event from:
protected void Page_Init(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
//databind lv_Questions
}
}
to:
protected void Page_Init(object sender, EventArgs e)
{
//databind lv_Questions
}
And it fixed my problem. Still a little confused as to why I want to databind regardless of whether it's a postback or not but the issue is resolved.
It looks like you're adding your textbox to a Placeholder control... but then you're searching a ListViewDataItem container for it later.
Seems to me that you need to search for the Placeholder first, and then search it for the textbox.
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)