Develop Reference

c# Retrieve event from HTML code set in control placeholder

I'm doing a C# 3-tier project about pets
On load of the first webform I make a query to the database and get the data of all pets (id, name, photo) as a List to be shown as cards with images in HTML, I'm using Materialize by the way, I leave this link as example http://materializecss.com/cards.html
My code behind (Pets.aspx.cs) is this
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
NegPet negPet = new NegPet();
StringBuilder sbHtml = new StringBuilder();
List<EntPet> listEntPet = negPet.getAllPet(5); //5 is the user code (get all pets from user 5)
if (listEntPet.Count > 0)
{
foreach (EntPet entPet in listEntPet)
{
sbHtml.Append("<div class=\"col s6 m4\">");
sbHtml.Append("<div class=\"card\">");
sbHtml.Append("<div class=\"card-image\">");
sbHtml.Append("<img src=\"http://www.dogzone.com/images/breeds/beagle.jpg\" alt=\"\" class=\"circle responsive-img\" />");
sbHtml.Append("<asp:LinkButton id=\"lb_"+ entPet.Id_pet + "\" runat=\"server\" CommandArgument='<%# Eval(\""+ entPet.Id_pet + "\") %>')");
sbHtml.Append("\" click=\"updatePet_Click\" class=\"btn-floating halfway-fab waves-effect waves-light red\"><i class=\"material-icons\">edit</i></a>");
sbHtml.Append("</div>");
sbHtml.Append("<div class=\"card-content\">");
sbHtml.Append("<span class=\"card-title\">");
sbHtml.Append(entPet.Name_pet);
sbHtml.Append("</span>");
sbHtml.Append("</div>");
sbHtml.Append("</div>");
sbHtml.Append("</div>");
}
} else
{
sbHtml.Append("<h2>No pets found</h2>");
}
galPet.Controls.Add(new Literal { Text = sbHtml.ToString() });
}
}
Where galPet is a
<asp:PlaceHolder ID="galPet" runat="server" />
This code returns me all the "Id" and "Name" of "Pets" and sets it in the HTML design that I want, similar to a gallery. The problem comes when I try to get to the event onClick="updatePet_Click" apparently it never reaches it's method behind
public void updatePet_Click(Object sender, EventArgs e)
{
LinkButton btn = (LinkButton)(sender);
string yourValue = btn.CommandArgument.Substring(3);
ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('" + yourValue + "');", true);
}
What I'm trying to do with this code is retrieve the ID from the clicked asp:LinkButton so I can use it in code behind
I also tried changing the event to "OnClick" but I got this error when tried to click it
Pets.aspx:24 Uncaught ReferenceError: updatePet_Click is not defined
at HTMLUnknownElement.onclick (Pet.aspx:24)
I would like to know how to retrieve the ID to work it in the code behind or if there is another way to pass my list to the HTML design where I can get the clicked ID easier. Thanks

CreateDirectory with AjaxFileUpload into a specific folder

I am trying to create a folder then upload documents to that same folder with AjaxFileUpload function, and I need the folder path to include the value of a text box in my form; however, I cannot seem to find any good resources to show me how to do so, so any help would be appreciated. Here is my code:
aspx page (the below is within an update panel):
<asp:AjaxFileUpload ID="CertificateUpload" ThrobberID="myThrobber" runat="server" MaximumNumberOfFiles="10" Width="600px" OnUploadStart="CreateFolder_Click" OnUploadComplete="File_Upload" />
apsx.cs page:
protected void CreateFolder_Click(object sender, EventArgs e)
{
string folderName = #"P:\Training Records\Training Detail Records\Individual Records";
string pathString = Path.Combine(folderName, firstnametier1.Text + " " + lastnametier1.Text);
if (!Directory.Exists(pathString))
{
Directory.CreateDirectory(pathString);
}
}
protected void File_Upload(object sender, AjaxFileUploadEventArgs e)
{
string filename = e.FileName;
string FinalFolder = "~/Training Detail Records/Individual Records/";
string strDestPath = Server.MapPath(#FinalFolder);
CertificateUpload.SaveAs(#strDestPath + filename);
}
}
I am trying to put the these two together so the folder gets created if necessary when I hit the upload button and I would like to add an extra text value to the final folder path like this:
string FinalFolder = "~/Training Detail Records/Individual Records/" + Textbox.Text + "/";
But when I try this it does not work. Again, any help will be welcome.
Thanks

I figured it out:
Here is the code for the aspx.cs page:
first I added the following to the SelectedIndexChanged(object sender, EventArgs e) section:
string fullname = firstnametier1.Text + " " + lastnametier1.Text;
Session["fname"] = fullname;
That helped store the value of the two text fields in the session so I could use it in the ajaxfileupload function.
Second I adjusted my other piece of code like so:
protected void File_Upload(object sender, AjaxFileUploadEventArgs e)
{
string folderName = "P:/Training Records/Training Detail Records/Individual Records/" + Session["fname"].ToString() + "/";
if (!Directory.Exists(folderName))
{
Directory.CreateDirectory(Server.MapPath(folderName));
}
string filename = e.FileName;
string strDestPath = Server.MapPath(#folderName);
CertificateUpload.SaveAs(#strDestPath + filename);
}
And now it works! I am creating a folder with the name I want and adding the data to it.
I am not a professional programmer so if you see any issues with this code or can make it better, please do so. I hope this helps other people.

how can i get value of all controls created in runtime in C# asp.net

// this function create mutiple htmlcontrol with id fileid1,fileid2, fileid3 etc "content_data" is a html div id.
protected void enter_rec_btn_Click(object sender, EventArgs e)
{
String control_data="";
for (Int64 x = 1; x <= 4; x++)
{
control_data = control_data + "<input type='text' id='fileid" + x + "' runat='server' /> ";
}
content_data.InnerHtml = control_data;
}
//now in another btn click just access the controls
for(Int64 i=1;i<=4;i++)
{
HtmlInputText text1,
text1 = (System.Web.UI.HtmlControls.HtmlInputText)Page.FindControl("fileid" + i);
Response.write(text1.value);
}
but it can't find the control.i already include using System.Web.UI.HtmlControls.
Help me..
thanks in advance

You are rendering a string in the Div and not actually adding the control to the web-page so find control will not work you may have to read the html of the Div you are writing to to get the controls.
Alternatively add an actual control to the page to be able to use findcontrol.
i.e MyPannel.controls.add(new ctrl.....
Good Example found here :)
http://learning2code.net/Learn/2009/8/12/Adding-Controls-to-an-ASPNET-form-Dynamically.aspx

rangevalidator c# how to use later in code

I created a range validator and would like to trigger it once the submit button was clicked.
RangeValidator rv_tbAbsenceDay = new RangeValidator();
rv_tbAbsenceDay.ID = "rv_tbAbsenceDay" + tbAbsenceDay.ID;
rv_tbAbsenceDay.ControlToValidate = tbAbsenceDay.ID;
rv_tbAbsenceDay.EnableClientScript = true;
rv_tbAbsenceDay.Display = ValidatorDisplay.Dynamic;
rv_tbAbsenceDay.MinimumValue = DateTime.Now.AddMonths(-6).ToString("d");
rv_tbAbsenceDay.MaximumValue = DateTime.Now.ToString("d");
rv_tbAbsenceDay.ErrorMessage = "Date cannot be older than 6 months and not in the future.";
rv_tbAbsenceDay.SetFocusOnError = true;
plcMyStaff.Controls.Add(rv_tbAbsenceDay);
plcMyStaff is a placeholder.
<asp:PlaceHolder ID="plcMyStaff" runat="server"></asp:PlaceHolder>
How do I get hold of the created range validator to trigger it i.e. rv.validate(); ?
I have tried this:
protected void MarkAsSick_Command(Object sender, CommandEventArgs e)
{
DropDownList tempddlReason = (DropDownList)plcMyStaff.FindControl("ddlReason" + e.CommandArgument.ToString());
TextBox temptbAbsenceDay = (TextBox)plcMyStaff.FindControl("tbAbsenceDay" + e.CommandArgument.ToString());
TextBox temptbLastDayWorked = (TextBox)plcMyStaff.FindControl("tbLastDayWorked" + e.CommandArgument.ToString());
RangeValidator temprv_tbAbsenceDay = (RangeValidator)plcMyStaff.FindControl("rv_tbAbsenceDay" + e.CommandArgument.ToString());
temprv_tbAbsenceDay.validate();
...
Hope you can help me.
thanks,
Andy

First off to debug this I would suggest examining the plcMyStaff object in which you are adding the control to see if it does in fact contain the control you wish to access.
You should be able to retrieve it from the Page object that your webform inherits.
Page.FindControl();
// Or you can Iterate through each control to see what the control is called and test for the name you want
foreach (var control in Page.Controls)
{
}

How to set dynamic parameter values to custom control from web page

I have one image button in the custom control like below.
public string SearchTableName = string.Empty;
public string SearchColumnName = string.Empty;
public string SiteURL = string.Empty;
ImageButton _imgbtn;
protected override void OnInit(EventArgs e)
{
_imgbtn = new ImageButton();
_imgbtn.ImageUrl = ImageURL;
_imgbtn.OnClientClick = "ShowSearchBox('" + SiteURL +"/_layouts/CustomSearch/SearchPage/Searchpage.aspx?table_name=" + SearchTableName + " &column_name=" + SearchColumnName + "')";
}
On Clicking of the image button I want to migrate to the another window which is a popup. For this I written a javascript function. I am setting the SearchTableName and SearchColumnName in the web page in which we are consuming this custom control like below. Before consuming I registered this control in web page with register tag.
<ncc:SearchControl runat="server" ID="txtSearchControl" /> In code behind file of this webpage I am using following code to set the values.
protected void Page_Load(object sender, EventArgs e)
{
txtSearchControl.ImageURL = "_layouts/Images/settingsicon.gif";
txtSearchControl.SearchTableName = "Employees";
txtSearchControl.SearchColumnName = "LastName";
txtSearchControl.SiteURL = "http://Sp2010:8787";
}
Now coming to the problem, when I click the image button the SearchTableName and SearchColumnName values are not coming. I think I am calling OnClientClick function, thats why the values are not being set. But how to set the values for the custom control based on the values setting in the webpage. If I use the Click function will it serve my purpose? If so, how to call that javascript function from this click event.

Finally got solution. I am initializing the values in the page init method in the custom control. Thats why the values i am setting in the visual webpart page are not being captured. Now I changed the initializing the values in CreateChildControl method. Now it works perfectly. Thank you.