J'ai deux boutons:
<asp:Button ID="Button1" runat="server" Text="Button" />
<asp:Button ID="Button2" runat="server" Text="Button" />
Comment puis-je déterminer sur pageLoad lequel de ces deux éléments a provoqué la publication? Existe-t-il une solution courte, car je sais que seuls deux contrôles peuvent provoquer cette publication?
Vous pouvez utiliser cette méthode pour obtenir le contrôle qui a provoqué la publication:
/// <summary>
/// Retrieves the control that caused the postback.
/// </summary>
/// <param name="page"></param>
/// <returns></returns>
private Control GetControlThatCausedPostBack(Page page)
{
//initialize a control and set it to null
Control ctrl = null;
//get the event target name and find the control
string ctrlName = page.Request.Params.Get("__EVENTTARGET");
if (!String.IsNullOrEmpty(ctrlName))
ctrl = page.FindControl(ctrlName);
//return the control to the calling method
return ctrl;
}
http://geekswithblogs.net/mahesh/archive/2006/06/27/83264.aspx
private string getPostBackControlName()
{
Control control = null;
//first we will check the "__EVENTTARGET" because if post back made by the controls
//which used "_doPostBack" function also available in Request.Form collection.
string ctrlname = Page.Request.Params["__EVENTTARGET"];
if (ctrlname != null && ctrlname != String.Empty)
{
control = Page.FindControl(ctrlname);
}
// if __EVENTTARGET is null, the control is a button type and we need to
// iterate over the form collection to find it
else
{
string ctrlStr = String.Empty;
Control c = null;
foreach (string ctl in Page.Request.Form)
{
//handle ImageButton they having an additional "quasi-property" in their Id which identifies
//mouse x and y coordinates
if (ctl.EndsWith(".x") || ctl.EndsWith(".y"))
{
ctrlStr = ctl.Substring(0, ctl.Length - 2);
c = Page.FindControl(ctrlStr);
}
else
{
c = Page.FindControl(ctl);
}
if (c is System.Web.UI.WebControls.Button ||
c is System.Web.UI.WebControls.ImageButton)
{
control = c;
break;
}
}
}
if (control != null)
return control.ID;
else
return string.Empty;
}
Cela aide à trouver le nom du contrôle qui a causé la publication dans le chargement de la page. Cela m'a aidé.Espoir que cela aide aussi quelqu'un d'autre
<asp:Button ID="Button1" runat="server" Text="Button"
OnClientClick = "SetSource(this.id)" />
<asp:ImageButton ID="ImageButton1" runat="server"
OnClientClick = "SetSource(this.id)" />
<script type = "text/javascript">
function SetSource(SourceID)
{
var hidSourceID =
document.getElementById("<%=hidSourceID.ClientID%>");
hidSourceID.value = SourceID;
}
</script>
on code behind you can get the ID of the function using :
if (IsPostBack)
{
string CtrlID = string.Empty;
if (Request.Form[hidSourceID.UniqueID] != null &&
Request.Form[hidSourceID.UniqueID] != string.Empty)
{
CtrlID = Request.Form[hidSourceID.UniqueID];
}
}
protected void ReUsedMethod_Click(object sender, EventArgs e)
{
string ctrlName = ((Button)sender).ID;
}