Cannot implicitly convert type 'System.Web.UI.Control' to 'System.IO.MemoryStream' - C# Discussion Boards

3-Oct-08 22:48

That doesn't seem to work either. Frown | :(

I also just found out that I can't load/apply an external stylesheet...

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

modified on Saturday, October 4, 2008 6:13 AM

Jaime Olivares4-Oct-08 2:16

Jaime Olivares

4-Oct-08 2:16

John Simmons / outlaw programmer wrote:
I also just found out that I can't load/apply an external stylesheet

That's not true, you can use stylesheets in local html files.
Maybe you have not described your problem clearly.

Best regards,
Jaime.

#realJSOP4-Oct-08 2:35

4-Oct-08 2:35

I didn't say the control couldn't. I was saying I can't get it to. Here's the code:

private string BuildHtml()
{
	StringBuilder builder = new StringBuilder("");
	builder.Append("<html>");
	builder.Append("<head>");
	builder.AppendFormat("<base href='{0}' />", Application.StartupPath);

	// this line doesn't appear to have any effect
	//builder.Append("<link rel='stylesheet' type='text/css' href='cpam.css' />");

	// but this code works
	builder.Append("<style>");
	builder.Append("body { font-family:arial; font-size:11pt; }");
	builder.Append(".articleTable { width:100%; border:0; background-color:Black; ");
	builder.Append("                font-family:arial; font-size:11pt; }");
	builder.Append(".darkRowChanged { background-color:#B1E3FF; }");
	builder.Append(".lightRowChanged { background-color:#E5F6FF; }");
	builder.Append(".darkRow { background-color:#EEE; }");
	builder.Append(".lightRow { background-color:white; }");
	builder.Append(".descText { font-size:9pt;color:#777;margin-top:3; }");
	builder.Append(".titleText { font-weight:bold; font-style:italic; }");
	builder.Append(".headerRow { background-color:#999; height:20px; line-height:20px; }");
	builder.Append(".dataRow { height:60px; }");
	builder.Append("</style>");

	// closing open tags
	builder.Append("</head>");
	builder.Append("<body>\n");
	builder.Append("</body>");
	builder.Append("</html>");
	return builder.ToString();
}

// usage 
this.webBrowser1.Navigate("about:blank");
HtmlDocument doc = this.webBrowser1.Document;
doc.Write(string.Empty);
this.webBrowser1.DocumentText = BuildHtml();

I've also tried the following to get the file:

href="./cpam.css"
href="c:\fully\qualified\path\cpam.css"

I have a feeling that if I can find out why either images won't display or the css file won't load, the whole thing will fall into place. I simply don't know what I've missed here, and finding info with google on this problem is impossible because of the lack of documentation anywhere concerning the webbrowser control.

Jaime Olivares4-Oct-08 2:50

Jaime Olivares

4-Oct-08 2:50

again, you should try with the file protocol:

href="file://c:\fully\qualified\path\cpam.css"

Best regards,
Jaime.

#realJSOP4-Oct-08 3:13

4-Oct-08 3:13

I *did* try that and it didn't work.

Everything I've managed to find on the web says that the normal DOS path should work, and nobody else has mentioned the "file://" thing.

Wendelius4-Oct-08 7:14

Wendelius

4-Oct-08 7:14

Few ideas:
- when you used Application.StartupPath, did you place the css-file in your projects \bin\Debug-directory, not in the project directory?
- you can try using / as directory separator instead of \
- most html-files use double quotes for href's like href="..." so that would be also worth trying.

The need to optimize rises from a bad design

#realJSOP4-Oct-08 8:42

Cannot implicitly convert type 'System.Web.UI.Control' to 'System.IO.MemoryStream'

4-Oct-08 8:42

Ya know, a lot of people wouldn't come back to a thread like this simply to admit that they were an idiot... But I was an idiot. Smile | :)

I was copying the files in question to the WRONG debug folder. Smile | :)

technette3-Oct-08 13:51

technette

3-Oct-08 13:51

I'm trying to correctly write the stream data to control.

Response.Write(stmDetailData = DWGControl);

Full event code:

protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
Control DWGControl = FindControl("dwgViewerCtrl");
const string sql = "SELECT Detail_ID, Detail_DWG from Detail_Info";
try
{
using (System.Data.SqlClient.SqlConnection cn = new System.Data.SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings["DetailsDBFConnectionString3"].ConnectionString))
cn.Open();

using (System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand("SELECT Detail_ID, Detail_DWG from Detail_Info"));

System.Data.SqlClient.SqlDataAdapter da = new System.Data.SqlClient.SqlDataAdapter();
DataSet_Details ds = new DataSet_Details();
da.Fill(ds, "DetailInfo");
int c = ds.Tables["DetailInfo"].Rows.Count;

if (c > 0)
{
Byte[] byteDetailData = new Byte[0];
byteDetailData = (Byte[])(ds.Tables["DetailInfo"].Rows[c - 1]["Detail_dwg"]);
System.IO.MemoryStream stmDetailData = new System.IO.MemoryStream(byteDetailData);
Response.Write(stmDetailData = DWGControl);

}
cn.Close();
}
catch (Exception ex)
{ MessageBox.Show(ex.Message); }

}

Re: Cannot implicitly convert type 'System.Web.UI.Control' to 'System.IO.MemoryStream'

Jaime Olivares3-Oct-08 19:33

Jaime Olivares

3-Oct-08 19:33

I don't understand your line:
Response.Write(stmDetailData = DWGControl);

I think it should be instead:
Response.ContentType = "application/dwg";
Response.BinaryWrite(stmDetailData.ToArray());

Best regards,
Jaime.

compare 2 datetime and get hours

Mohammed Elkholy3-Oct-08 9:36

Mohammed Elkholy

3-Oct-08 9:36

first thanks for evryone help others in this website

i would like to compare between tow datetime and get the deffrance between them in hours

example

in parking we get the entrance datetime and leave datetime

i want to compare tow datetime and get the real hours of parking

MD_NADA

Re: compare 2 datetime and get hours

J4amieC3-Oct-08 9:56

J4amieC

3-Oct-08 9:56

TimeSpan ts = dateTime1 - dateTime2;
Console.WriteLine(ts.TotalHours);

Re: compare 2 datetime and get hours

J$3-Oct-08 9:59

3-Oct-08 9:59

You should look into the TimeSpan object.

TimeSpan timeSpan = DateTime.Now.Subtract(new DateTime(2008, 10, 3));

To get the whole number of hours, its as simple as int hours = timeSpan.Hours

If you want to get the total hours, double totalHours = timeSpan.TotalHours

If you're unclear on any of this I recommend taking a look at the documentation or doing a google search on System.TimeSpan

Put sound on own simple program

MorganSim3-Oct-08 8:46

MorganSim

3-Oct-08 8:46

Have been trying up an easy program, but now want to try make it more user friendly by maybe playing a song in the background. How can I go about this one.Anyone help please.(C# base). Cry | :((

DaveyM693-Oct-08 9:04

DaveyM69

3-Oct-08 9:04

It depends on how you want to do it. The simplest way is:

System.Media.SoundPlayer soundPlayer = new System.Media.SoundPlayer();
soundPlayer.SoundLocation = @"c:\chord.wav"; // full path to file
soundPlayer.Play();

Don't forget to call soundPlayer.Dispose() when you're finished with it!

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

MorganSim3-Oct-08 10:22

MorganSim

3-Oct-08 10:22

Thanks alot that helped and am able to get through.could have kissed you if you were next to me.(just a jok)
Now check here, that method can only work with .wav file type only? or you can use other files(file size for a wav file is too large).
waiting....
Thanks alot D'Oh! | :doh:

Dan Neely3-Oct-08 10:32

Dan Neely

3-Oct-08 10:32

IT would have taken less time to change your code to point to an .mp3 file than it did to post the question here.

Today's lesson is brought to you by the word "niggardly". Remember kids, don't attribute to racism what can be explained by Scandinavian language roots.
-- Robert Royall

DaveyM693-Oct-08 10:58

DaveyM69

3-Oct-08 10:58

You may be better off embedding media player. Right click on your toolbox and select Chose Items (you may have to wait a while for the next dialog!). Click on the COM Components tab and scroll down and select Windows Media Player.

Drag and drop (& resize) a WMP onto your form. Set the URL property to point to your file and you're done.

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)

PIEBALDconsult3-Oct-08 9:37

PIEBALDconsult

3-Oct-08 9:37

Sounds user hostile to me.

MorganSim3-Oct-08 9:51

MorganSim

3-Oct-08 9:51

What's that supposed to mean? Confused | :confused: