Re: saving files from database - C# Discussion Boards

Icarus1239-Mar-08 22:41

9-Mar-08 22:41

Hi there.

I have saved an MS word file to my database.

I retrieve the following fields when accessing the DB:

byte[],
filename,
extension

I now want to, in code behind, open an "Download to" window, where i can save the file on my local machine.

P.S i dont just save word files... i want to save any type of file.

Can anyone help me with the problem?

Re: saving files from database

Vasudevan Deepak Kumar9-Mar-08 22:47

Vasudevan Deepak Kumar

9-Mar-08 22:47

Did you look at Response.WriteFile?

Vasudevan Deepak Kumar
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Re: saving files from database

Icarus1239-Mar-08 22:54

Icarus123

9-Mar-08 22:54

no, but how would you integrate the fields with Response.WriteFile

Re: saving files from database

Christian Graus9-Mar-08 23:28

Christian Graus

9-Mar-08 23:28

Basically, you set the header to say you're downloading the file, and then stuff the bytes of the file into there.

You should ask ASP.NET questions in the ASP.NET forum BTW.

Christian Graus - Microsoft MVP - C++

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Re: saving files from database

Icarus1239-Mar-08 23:44

Icarus123

9-Mar-08 23:44

it is a bit unclear, what header are you talking about?
"you set the header to say you're downloading the file".

could you give me an example of this?

Sorry about the "Not being in an asp forum"..

Re: saving files from database

N a v a n e e t h9-Mar-08 23:49

N a v a n e e t h

9-Mar-08 23:49

Icarus123 wrote:
it is a bit unclear, what header are you talking about?

He would be talking about HTTP headers.

Icarus123 wrote:
could you give me an example of this?

Google[^]

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Re: saving files from database

Icarus12310-Mar-08 0:42

Icarus123

10-Mar-08 0:42

thanks for the example.

one last question, because the file has no path, only byte[], how would i populate the FileInfo, so that i can use that information in the headers and WriteFile?

Re: saving files from database

Christian Graus9-Mar-08 23:51

Christian Graus

9-Mar-08 23:51

Response.ContentType="application/zip";
Response.AddHeader( "content-disposition","attachment; filename="+filename);
Response.BinaryWrite(byteArray);
Response.End();

That will cause whatever you want, to be written to the browser so the user downloads it.

How can access the arguments sent by (JavaScript request) ajax ?

dipak.dipak9-Mar-08 21:20

dipak.dipak

9-Mar-08 21:20

Hello everybody,

I have created a javascript (ajax) making a request to the server for save the infomation i have passed as arguments with the request. like this

var args = "id=" + ID + "&name=" + Name + "&sex=" + Sex + "&age=" + Age;

xmlHttp.open("POST","SaveInfo.aspx",true);
xmlHttp.onreadystatechange = function theStateChanged()
{
if (xmlHttp.readyState==4 && xmlHttp.status==200)
{
alert("Successfully Saved");
}
}
xmlHttp.Send(args);

these are OK. but i want to catch the args from my asp.net webpage.
When i am using GET method for request, i am sending arguments by query string, and in .net page i can access that using Response.QuerySting["key1"].ToString(); But this time i am getting problem. how can i access the arguments passed. Please help me.

Thanks in advance for help.

Dipak

Re: How can access the arguments sent by (JavaScript request) ajax ?

Christian Graus9-Mar-08 23:31

Christian Graus

9-Mar-08 23:31

Please don't cross post.

The httpRequest object has properties like responseText that you can use to get data back from the server.

Re: How can access the arguments sent by (JavaScript request) ajax ?

dipak.dipak10-Mar-08 0:26

dipak.dipak

10-Mar-08 0:26

Thanks for reply.
I just need to get data "POST" from the client side (by javascript with send method) in the page asp.net page with C# code.

var xmlHttp = GetXmlHttpObject();
xmlHttp.open("POST","SaveInfo.aspx",true);
var args = "id=" + ID + "&name=" + Name + "&sex=" + Sex + "&age=" + Age;

xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
xmlHttp.setRequestHeader("Content-length", args.length);
xmlHttp.setRequestHeader("Connection", "close");

xmlHttp.onreadystatechange = function theStateChanged()
{
alert(xmlHttp.status);
if (xmlHttp.readyState==4 && xmlHttp.status==200)
{
alert("Successfully Saved");
}
}
xmlHttp.Send(args);

So, this is the code.
I want to access the args from the page SaveInfo.aspx . how can access that to save those on the database using C# code on this page.

Please help me.

Dipak

Re: How can access the arguments sent by (JavaScript request) ajax ?

leppie10-Mar-08 0:57

leppie

10-Mar-08 0:57

dipak.dipak wrote:
So, this is the code.
I want to access the args from the page SaveInfo.aspx . how can access that to save those on the database using C# code on this page.

Request.QueryString

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IronScheme - 1.0 alpha 2 out now

Using tor to connect with different ip each time

metallica_rock109-Mar-08 21:06

metallica_rock10

9-Mar-08 21:06

Hi sorry if i m posting this on the worong forum.
But i need help on this.

i need to ping a website but with different ip each time with the help of tor.

can ne1 help ne help will be appreciated.

Thanks

[Multiple Duplication of the Post :: Please Ignore] Re: Using tor to connect with different ip each time

Vasudevan Deepak Kumar9-Mar-08 22:31

Vasudevan Deepak Kumar

9-Mar-08 22:31

Stop crop-dusting the forum with duplicate copies of the same post. Your other post in ASP.NET forum is here:

http://www.codeproject.com/script/Forums/View.aspx?fid=12076&msg=2458832[^]

how to check fax number if working or not via csharp

Kennie_n20009-Mar-08 21:00

Kennie_n2000

9-Mar-08 21:00

it is possible to write a a windows app that will dial a fax number and determine if the fax number is working or not ? any help is greatly appreciate

Re: how to check fax number if working or not via csharp

N a v a n e e t h9-Mar-08 21:19

N a v a n e e t h

9-Mar-08 21:19

A FAX number would be normal telephone number, right ? If yes, you can use TAPI[^] to dial to that.

All C# applications should call Application.Quit(); in the beginning to avoid any .NET problems.- Unclyclopedia

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Doubt

ganesamoorthy9-Mar-08 20:52

ganesamoorthy

9-Mar-08 20:52

How Shall we correct and find the error serial port (com name) at in send SMS program in C#?

gm

modified on Monday, March 10, 2008 6:49 AM

Re: Doubt

martin_hughes9-Mar-08 21:47

martin_hughes

9-Mar-08 21:47

I'd try sticky-back plastic and some pva glue.

DataGridViiew Problem

AshokParikh9-Mar-08 20:51

AshokParikh

9-Mar-08 20:51

I am working on VS2005,having a DataGridView Control bound to a data source. Out of 13 coulums in the grid, 3 columns are DataGridViewComboBoxColumn and two Text Columns have WrapMode=True. I found that add/update etc. work fine, but since the wrpped text was not properly visible, I set the AutoSizeRowsMode = DisplayedCells, and I started getting following error

DataGrid Cell value is not valid

The error repeats for all the ComboBox type Cells and contents are not displayed. Once I restore the AutoSizeRowsMode=none the error disappears?

Any help

Ashok

Re: DataGridViiew Problem

Xmen Real 9-Mar-08 23:41

Xmen Real

9-Mar-08 23:41

this is because you set it to DisplayedCell, if your value is null then this comes, try others

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Rs0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-i?TV.C\y<p?jxsg-b$f4ia>
--------------------------------------------------------
128 bit encrypted signature, crack if you can

Re: DataGridViiew Problem

AshokParikh10-Mar-08 2:00

AshokParikh

10-Mar-08 2:00

Thanks XMen, I do not have any null cell but the error takes place. In fact in the database no field is allowed to be null.

Can you help?

Re: DataGridViiew Problem

Xmen Real 10-Mar-08 5:41

Xmen Real

10-Mar-08 5:41

change the autosize property to ColumnHeader, if it wont work, try others

focus on a treeview node

Krazy Programmer9-Mar-08 20:51

Krazy Programmer

9-Mar-08 20:51

** i have asked this question before also ..this one is modified thats why i have asked it again **

Hi
This is my treeview structure

..Node 0
:...Node 1
:...Node 2
* Node 0 is parent of Node 1
* Node 1 is parent of Node 2

Now when i am selecting Node 2 most of the times the focus is shifted to its parent node i.e Node 1 ..the same thing is happening with the Node 1 focus is coming into Node 0..
Is that i am missing something any Settings or the problem is within my system.

** please show the name of the node in a message box ..** this will clear my point

*** Why EXPERTS behave like a fool ***

Re: focus on a treeview node

C1AllenS9-Mar-08 21:04

C1AllenS

9-Mar-08 21:04

Hello,

I am not quite sure about this behavior. This should not happen. It might be some part of the coding
that is leading to the change in focus.

You can try this code and check.

private void Form1_Load(object sender, EventArgs e)<br />
{<br />
     this.treeView1.Nodes.Add("Node0", "Node0");<br />
     this.treeView1.Nodes[0].Nodes.Add("Node1", "Node1");<br />
     this.treeView1.Nodes[0].Nodes[0].Nodes.Add("Node2", "Node2");<br />
<br />
}<br />
<br />
private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)<br />
{<br />
     MessageBox.Show(e.Node.Name);<br />
}

I hope this will help.

Regards,
Allen

Allen Smith

Software Engineer
ComponentOne LLC
www.componentone.com

Re: focus on a treeview node

Krazy Programmer9-Mar-08 22:43

Krazy Programmer

9-Mar-08 22:43

thank you...my mistake was

MessageBox.Show(treeView1.SelectedNode.Name);

This was creating Problem...

*** Why EXPERTS behave like a fool ***

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