I am generating dynamic textbox controls on drop down selected index change event.
protected void ddlCategories_SelectedIndexChanged(object sender, EventArgs e)
{
foreach (Attributes attribute in getAllAttributes(Convert.ToInt32(ddlCategories.SelectedValue)))
{
Panel div = new Panel();
div.Attributes.Add("class", "form-group");
HtmlGenericControl lbl = new HtmlGenericControl("label");
lbl.Attributes.Add("class", "col-lg-2 control-label");
lbl.InnerText = attribute.Name;
Panel innerdiv = new Panel();
innerdiv.Attributes.Add("class", "col-lg-10");
TextBox txt = new TextBox();
txt.ID = attribute.ID.ToString();
txt.Attributes.Add("class", "form-control");
innerdiv.Controls.Add(txt);
div.Controls.Add(lbl);
div.Controls.Add(innerdiv);
CustomAttributes.Controls.Add(div);
}
}
Now after the user fill up the values in the form i want to get the values of the dynamically generated controls. But CustomAttributes.findControls("")
doesn't work for me. it gives null all the time.
I also tried
var textBoxesInContainer = CustomAttributes.Controls.OfType<TextBox>();
but it also doesnt work.
Can any one please tell me what is going wrong here.
Thanks
Finally i found the reason after googling the issue. The issue in this question is a view state.
In asp.net when the page post back it loses the viewstate for the dynamically generated controls. So to get over this issue i recreated the controls in the page load event when it is post back. in that way controls will be added back to the current page and i can find those controls in the button on click event.
thanks all for your time and guidence.
Panel div = new Panel();
Panel innerdiv = new Panel();
TextBox txt = new TextBox();
innerdiv.Controls.Add(txt);
div.Controls.Add(innerdiv);
CustomAttributes.Controls.Add(div);
Your CustomAttributes
holds Panel
. Try this :
var textboxes = CustomAttributes.Controls.OfType<Panel>()
.Select(p => p.Controls.OfType<Panel>().First())
.Select(p => p.Controls.OfType<TextBox>().First())
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