I am stuck on something: I am creating a hyperlink at runtime that has a navigation URL. I need to define its click event so that I can save a few values to the database. I did something like below but without success.
Could you please suggest an alternative?
protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e) {
if (e.Item is GridDataItem) {
HyperLink link = (HyperLink)gridDataItem["ContentTitle"].Controls[0];
link.ForeColor = System.Drawing.Color.Navy;
link.ToolTip = Common.grdTextCell(gridDataItem["ContentSummaryDescr"].Text);
link.NavigateUrl = "~/SomePath/" + gridDataItem["ContentName"].Text;
link.Target = "_blank";
link.Attributes.Add("onclick", "document.getElementById('" +
dummyBtn.ClientID + "').click();");
}
}
protected void dummyBtn_Click(object sender, EventArgs e) {
}
But the button click event is not firing, it simply navigates to the URL. What to do please?
For a server side event to fire you would need a LinkButton and not a HyperLink
LinkButton has a Click event handler which you can use.
HyperLink only redirects and has no corresponding Click event handler associated for server side code
You want a LinkButton, not a HyperLink.
Here's some sample code to get you started (not tested)
protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
if (e.Item is GridDataItem)
{
LinkButton link = (LinkButton)gridDataItem["ContentTitle"].Controls[0];
link.Click += dummyBtn_Click;
}
}
protected void dummyBtn_Click(object sender, EventArgs e)
{
Response.Write("dummyBtn_Click");
}
You should be using Link Button. Just replace your Hyperlink with LinkButton in your code.It should work.
protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e) {
if (e.Item is GridDataItem) {
LinkButton link = (LinkButton )gridDataItem["ContentTitle"].Controls[0];
link.ForeColor = System.Drawing.Color.Navy;
link.ToolTip = Common.grdTextCell(gridDataItem["ContentSummaryDescr"].Text);
link.NavigateUrl = "~/SomePath/" + gridDataItem["ContentName"].Text;
link.Target = "_blank";
link.Click += dummyBtn_Click;
}
}
protected void dummyBtn_Click(object sender, EventArgs e) {
}
Related
I have a radioButton list and I want to set 0 as default index.
But,when page is posted by other button ,radiobuttonListChanged event is firing automaticly.
What should I do ?
protected void Page_Load (object sender, EventArgs e)
{
rblList.DataSource = MyDataSource();
rblList.DataBind ();
if (!IsPostBack)
{
rblAccounts.SelectedIndex = 0;
}
}
protected void rbl_Changed (object sender, EventArgs e)
{
Response.Write("Change Event fired");
}
In rbl_Changed event Write following code probably will help you out.
rbl.changed-= rbl_Changed;
rbl.changed = false;
rbl.changed+= rbl_Changed;
New to dynamic controls, but until now I have been creating them successfully in a
template field in my gridview, recently switched from a hyperlink to a link button
and had to make some changes but still not working
In my page I have the following code (abridged to salient parts)
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
...
...
TemplateField tf = new TemplateField();
tf.HeaderText = "Action";
tf.ItemTemplate = new AssignPage.MyTemplate(..., mylb);
GridView1.Columns.Add(tf);
protected void Page_PreInit(object sender, EventArgs e)
{
LinkButton lb = new LinkButton();
lb.Text = "AssignAll";
lb.Command += new CommandEventHandler(AssignAll_Click);
lb.CommandName = "XXX";
this.mylb = lb;
protected void AssignAll_Click(object sender, CommandEventArgs e)
{
string[] arg = new string[2]; // BREAK POINT HERE
arg = e.CommandArgument.ToString().Split(';');
...
...
Response.Redirect("BaseAndRepeats.aspx?id=" + r.Event.ID);
In the template class I have I have
LinkButton lb;
public MyTemplate(..., LinkButton _lb)
{
...
lb = _lb;
...
public void InstantiateIn(System.Web.UI.Control container)
{
...
...
// various conditional statements
lb.CommandArgument = mylist[rowCount].ReqtID.ToString() + ";" + mylist[rowCount].RotaUser;
container.Controls.Add(lb);
...
The break point in the handler is never reached
I thought I was creating the linkbutton in the right place
the linkbutton appears in the grid quite happily
when I click on the linkbutton there is a call
to Page_PreInit and to Page_Load and as I expected
it is a postback.
But AssignAll_Click is never called.
In the browser footer it shows "javascript: __dooPsotabck(..." when you hover
over the buttonlink
I believe the problem is this line:
lb.Command += new CommandEventHandler(AssignAll_Click);
Change it to:
lb.Command += AssignAll_Click;
Edit:
Also you want to move it from Page_PreInit to Page_Init but you may find more success with it in Page_Load (outside the IsPostBack). Here's an example that works for me:
On the ASPX page:
<asp:Panel ID="TestPanel" runat="server" />
Codebehind:
protected void Page_Init(object sender, EventArgs e)
{
//Init used because TestPanel doesn't exist yet
CreateTestButton();
}
private void CreateTestButton()
{
var lb = new LinkButton();
lb.Text = "hello";
lb.Command += lb_Command;
TestPanel.Controls.Add(lb);
}
void lb_Command(object sender, CommandEventArgs e)
{
throw new NotImplementedException();
}
Going over your code it looks like your adding another column into your GridView and creating a button inside that column for each row - but you've got the column being added on Page_Load and the button being created and bound to it before in Page_PreInit
ive two pages, one with a text box and a button, the other with a button a label. What i want to do is to display contents of the textbox on page 1, in the label of the page2 on button click. and then when i click the button to return to page1. preverse whats entered in the textbox on page1. sorry if its confusing. heres my code
page1.aspx
protected void Button1_Click(object sender, EventArgs e)
{
Session["fstName"] = txtBox.Text;
Response.Redirect("Page2.aspx");
}
page2.aspx
protected void Page_Load(object sender, EventArgs e)
{
string a = Session["fstName"].ToString();
lblPage2.Text = a;
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("WebForm1.aspx");
}
Where do you set the value of the text box when returning to WebForm1.aspx? It should be very similar to what you have for the label on Page2.aspx. Something like:
protected void Page_Load(object sender, EventArgs e)
{
string a = Session["fstName"].ToString();
txtBox.Text = a;
}
At worst, you may need to wrap some error checking around it. Maybe something like:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
if (Session["fstName"] != null)
{
string a = Session["fstName"].ToString();
txtBox.Text = a;
}
}
I have 2 buttons. The first button gets drawn from the code behind. The second button gets drawn when the first button is clicked. This works perfectly. When I add a event when the second button gets clicked this event won't be triggered. As you can see in the code below there is a btnTwo_click function. If I put a breakpoint on this function the program won't even break. Is there a way to trigger this event from the code behind (not using java script)?
Here is the code, I actually use this system in a table. But this simple code has the same problem in the end.
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
ImageButton btn = new ImageButton();
btn.Command += new CommandEventHandler(btnOne_Click);
form1.Controls.Add(btn);
}
void btnOne_Click(object sender, EventArgs e)
{
ImageButton btn = new ImageButton();
btn.Command += new CommandEventHandler(btnTwo_Click);
form1.Controls.Add(btn);
}
void btnTwo_Click(object sender, EventArgs e)
{
Label lblTest = new Label(); //BREAKPOINT
form1.Controls.Add(lblTest);
}
}
You have to add the second button on the Page_Load or Page_Init method of Page life cycle:
e.g.
protected void Page_Load(object sender, EventArgs e)
{
ImageButton btn = new ImageButton();
btn.Command += btnOne_Click;
form1.Controls.Add(btn);
ImageButton btn2 = new ImageButton();
btn2.Command += btnTwo_Click;
btn2.Visible = false;
form1.Controls.Add(btn2);
}
void btnOne_Click(object sender, EventArgs e)
{
// Your second button
form1.Controls[2].Visible = true;
}
void btnTwo_Click(object sender, EventArgs e)
{
ImageButton btn2 = (ImageButton)sender;
// Do something
}
Just move this line to Page_Load event and it will work ;)
btn.Command += new CommandEventHandler(btnTwo_Click);
Here is my code.
problem: When click om a row och on select the page is refreshing and i dont get the text in the lable17.text.
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow row = GridView1.SelectedRow;
Label17.Text = row.Cells[2].Text.ToString() ;
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.Attributes.Add("onmouseover", "this.style.cursor='Pointer';this.style.backgroundColor='Yellow'");
}
}
protected void GridView1_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
{
GridViewRow row = GridView1.Rows[e.NewSelectedIndex];
Label17.Text = "you selected" + row.Cells[2].Text;
}
Is your GridView in an UpdatePanel? If not the entire Page will postback when you click on the Button. Also, make sure that if you are setting the Text of Label17 in the Page_Load event that you only do it the first time i.e.
public void Page_Load(object sender, EventArgs e)
{
if(!Page.IsPostBack)
{
Label17.Text = "Default Text";
}
}