Develop Reference

Replace part of a asp label value without replacing entire content in the label

I'm passing some HTML codes as value to a asp:Label which contains div with unique ids and class names and inline JavaScript. I want to make changed or add extra div inside the label by replacing any particular character in the label string. How can I get this done?
Lets say I have the below HTML code as the value for the asp Label with ID lblcode, in the HTML code I have 3 div with content1, 2 and 3 inside a div lvl1container. I want to add a content 4 with HTML div tags by replacing the ++ADD_MORE++ with <div id=\"lvl1_4>content4</div>++ADD_MORE++.
Client side:
<asp:Label ID="lblcode" runat="server"></asp:Label>
<asp:TextBox ID="txtappend" runat="server"></asp:TextBox>
<asp:Button ID="btnappend" runat="server" Text="Append"/>
Server side:
string code = "<div id=\"lvl1container\">"+
"<div id=\"lvl1_1\">content1</div>"+
"<div id=\"lvl1_2\">content2</div>"+
"<div id=\"lvl1_3\">content3</div>"+
"++ADD_MORE++"+
"</div>";
lblcode.Text = code;
So instead of replacing the entire content of the label I want to search only for ++ADD_MORE++ and replace it with the value given inside the asp textbox txtappend. How can I get this done? thanks in advance.

In the append button click, try the below code
protected void btnappend_Click(object sender, EventArgs e)
{
System.Text.StringBuilder sb = new StringBuilder();
sb.Append(lblcode.Text);
sb.Replace("++ADD_MORE++", $"<div>{txtappend.Text}</div>");
sb.Append("++ADD_MORE++");
lblcode.Text = sb.ToString();
}

Cut Text to fit Textbox width and then right align

I have several Textboxes in my Form which display filepaths. Mostly the filepaths are too long to display in the textbox. Is there a possibility to cut the surplus text and append some point characters to it and then align it right?
For example:
If the path is C:\Programs\anotherfolder\blabla\thisisatest.xml
A Textbox should show: ...lder\blabla\thisisatest.xml
If I resize the textbox, the text in it shall resize/expand with it.
Is there a way to do this automatically, maybe via Resize event of a textbox.
Thank you very much.

This might help if you are looking for resizing your textbox based on the text entered. You can call this code on any event like when you move focus out of textbox or after the data is loaded in the textbox. You need to replace your textbox's actual text in below line in the code.
mySize = e.Graphics.MeasureString("This is a test", myFont);

if this is a webpage ..
include 2 hidden variables as following
<div>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:HiddenField ID="HiddenField1" runat="server" />
<asp:HiddenField ID="HiddenField2" runat="server" />
</div>
include jquery and the script as following
<script type="text/javascript">
$(document).ready(function () {
$('#TextBox1').focus(function () {
$('#TextBox1').val($('#HiddenField1').val());
});
$('#TextBox1').blur(function () {
$('#TextBox1').val($('#HiddenField2').val());
});
});
</script>
set the fields in the code behind
string str = #"C:\Programs\anotherfolder\blabla\thisisatest.xml";
HiddenField1.Value = str;
if (str.Length > 10)
{
TextBox1.Text = "..." + str.Substring(str.Length - 10, 10);
HiddenField2.Value = TextBox1.Text;
}
This will show the whole string only when focused on the textbox.
Here is a demo of how it will look like.
Let me know if this was helpful or if you have any queries

Use this code to remove surplus text:
private string GetShortText(string longText)
{
int validTextSize = 27;
if (longText.Length <= validTextSize)
return longText;
return "..."+longText.Substring(longText.Length - validTextSize);
}
And use above code like this:
string longText = #"C:\Programs\anotherfolder\blabla\thisisatest.xml";
txtPath.Text=GetShortText(longText);
An for change alignment, if your form is a Windows Form you can use this code:
txtPath.TextAlign = HorizontalAlignment.Right;
Or if your form is a WPF form use this code:
txtPath.HorizontalContentAlignment = System.Windows.HorizontalAlignment.Right;

How to assign dynamic placeholder to Textbox?

I know this question is asked before for assigning text to textbox, but they didn't have answers or the given answers didn't work for me. I have a static function for translations and I'm trying to use that to assign a placeholder to a Textbox. How can I do it in aspx page?
My code is:
<asp:TextBox ID="search" runat="server"
placeholder='<%# islem.DilGetir(7) %>'>
</asp:TextBox>
This one returns this sourcecode:
<input name="ctl00$search" type="text" id="ctl00_search">

You should set this attribute from the page code behind:
search.Attributes["placeholder"] = islem.DilGetir(7)

you can use ajax controll toolkit text box watermark I find it to be mnost usefull in aspx apps
http://www.asp.net/AjaxLibrary/AjaxControlToolkitSampleSite/TextBoxWatermark/TextBoxWatermark.aspx
<asp:TextBoxWatermarkExtender ID="TextBoxWatermarkExtender1" runat="server" TargetControlID ="search" WatermarkText="textthe my name" WatermarkCssClass="watermarked">
</asp:TextBoxWatermarkExtender>
on the back end
TextBoxWatermarkExtender1.WatermarkTex=islem.DilGetir(7);

I experienced the same problem. The exact solution: Take all placeholder's text to hiddenfield component(separated with , ) and with JS, take the inside array hiddenfield text and assign to input text's placeholder attr with jQuery or JS.

this code for multiselectbox choosen js and normal selectbox.
public void SelectFill(DataTable dtResult, HtmlSelect htmlSelect, string placeHolder, string textColumn, string valueColumn, string value)
{
htmlSelect.DataSource = dtResult;
htmlSelect.DataTextField = textColumn;
htmlSelect.DataValueField = valueColumn;
htmlSelect.DataBind();
bool isMultiple = false;
foreach (var item in htmlSelect.Attributes.Keys)
{
if (item.ToString() == "multiple")
{
isMultiple = true;
}
}
if (isMultiple)
{
htmlSelect.Attributes["data-placeholder"] = placeHolder;
}
else
{
ListItem placeHolderItem = new ListItem(placeHolder, "-1");//create placeholder option for non multible selectbox
placeHolderItem.Attributes.Add("disabled", "disabled");
htmlSelect.Items.Insert(0, placeHolderItem);
htmlSelect.Items[0].Selected = true;
}
}

Convert panel HTML to PDF using C# ASP.NET

I have a basic form with mostly textboxes and a few checkboxes and radio buttons. Pretty much when a user fills it out and hits submit, I need it to convert and display a PDF with the same structure and offer a print option. I have searched online and I have tried most of the options but nothing works.
I don't expect this to be too difficult, but I am fairly new to C# and can't figure out how to make an HTML panel into a PDF and print it. Any help would be appreciated, thanks in advance!
Here is the HTML for one of the labels and textboxes and the submit button:
<div>
<asp:Label ID="lblDate" runat="server" Text="Date:"></asp:Label>
<asp:TextBox ID="txtDate" runat="server"></asp:TextBox>
</div>
<asp:Button ID="SubmitButton" runat="server" Text="Button" OnClick="btnSubmit"/>
Once clicked, the .cs page will go through this:
litDate.Text = "Date: " + txtDate.Text + "<br />";
and update the panel to display the value:
<asp:Panel ID="PDFPanel" runat="server" Visible="false">
<asp:Literal ID="litDate" runat="server"></asp:Literal>
</asp:Panel>
I am not sure if the panel is needed, but this is how I was able to be sure I was getting the value back. Is there a way to go straight from submit to PDF and print?

Use something like http://code.google.com/p/wkhtmltopdf/
This roughly outlines how to do it: https://stackoverflow.com/a/18767473/181771

I made an asp.net website demo taking the contents of a panel or div and generating a pdf from the html. This is using NReco.PdfGenerator (another wkhtmltopdf wrapper):
https://github.com/jay8anks/Asp.net-HtmlToPdf_NReco.PdfGenerator
Yeah, it's a webform, but anyone sharp enough to do mvc should be able to adapt it fairly easily.
Basically, it is using javascript to get the html between a panel (div) tag and store it in a hiddenfield. Pretty straight forward, except if you want to have css or images, you can't use a relative url for them. I actually just embedded the css inline as a string, but there are other ways of doing it.
Then in the codebehind, this gets the html and generates a pdf from it:
protected void SaveHtmlToPdf()
{
string htmlOutput = Server.UrlDecode(HiddenField1.Value);
htmlOutput = string.Join(" ", System.Text.RegularExpressions.Regex.Split(htmlOutput, #"(?:\r\n|\n|\r|\t)"));
htmlOutput = htmlOutput.Replace("\"", "'");
string headerStyle = HeaderStyle();
string finalHtml = headerStyle + htmlOutput;
var strWr = new StringWriter();
var htmlWr = new HtmlTextWriter(strWr);
// base.Render(htmlWr);
var htmlToPdf = new HtmlToPdfConverter();
string filename = (orderId + ".pdf");
string filepath = "~/sales_pdfs";
string combinedFilePath = Path.Combine(Server.MapPath(filepath), filename).ToString();
for (int i = 1; i <= NumberOfRetries; ++i)
{
try
{
htmlToPdf.GeneratePdf(finalHtml, null, combinedFilePath);
break; // When done we can break loop
}
catch (IOException e)
{
// You may check error code to filter some exceptions, not every error
// can be recovered.
if (i <= NumberOfRetries)
{
Thread.Sleep(DelayOnRetry);
}
ltMsg.Text = "There was a problem creating the PDF";
}
}
}
This puts a pdf in a directory so it can be downloaded, but there are other ways that could be handled, as well. We actually wanted a copy of the PDF that someone was generating, so this was the direction we went in.

Position HTML button dynamically in C#

I know this should be real simple, but I have googled this problem and I do not see the same available properties for my button. What I have googled says I should be able to change an HTML button's location with the Location property. However, this is not an option for me. How do I change the button's location dynamically in C#?
Here is the relevant code in the ASPX.CS file:
protected void btnSubmit_Click(object sender, System.EventArgs e)
{
int cnt = FindOccurence("DropDownListID");
AppendRecords();
pnlDisplayData.Visible = false;
btnSubmit.Visible = false;
resultLabel.Attributes.Add("style", "align=center");
resultLabel.Visible = true;
}
I want to reposition btnSubmit. In the ASPX file this button is defined as:
<asp:button id="btnSubmit" runat="server" text="Submit" width="150px"
style="top:auto; left:auto"
OnClick="btnSubmit_Click"></asp:button>

The only thing wrong with your code I can see at the moment is that this line:
resultLabel.Attributes.Add("style", "align=center");
should read:
resultLabel.Attributes.Add("style", "align:center");
CSS properties are done like:
property:value;
NOT:
property=value;

set style on control using Style collection, this will add properly style to existing styles on control defined inline:
resultLabel.Style.Add("align", "center");
btnSubmit.Style.Add("top", "auto");
btnSubmit.Style.Add("left", "auto");
setting exact absolute location of button:
btnSubmit.Style.Add("position", "absolute");
btnSubmit.Style.Add("top", "10");
btnSubmit.Style.Add("left", "10");