Re: Required permissions cannot be acquired - C# Discussion Boards

22-Jun-04 23:25

I want to access a class (TestClass) that is in a given assembly(Test.dll) on my machine.
I use activator :

ObjectHandle objH=null;
objH=Activator.CreateInstanceFrom(@"\\Daniel\SharedDocs\Test.dll","TestClass");
TestClass tc=(TestClass)objH.Unwrap();
MessageBox.Show(tc.GetCompName());

But I get this error : "Required permissions cannot be acquired."

What should I do?
Thanks,
Daniel.

Jochen Kalmbach [MVP VC++]

Jochen Kalmbach [MVP VC++]23-Jun-04 0:44

23-Jun-04 0:44

You should not load the DLL from a network path... instead use a local copy. Or change the default security settings in "Control Panel".

Daniel Zaharia23-Jun-04 1:37

23-Jun-04 1:37

The exception type is : System.Security.Policy.PolicyException
I think it has somthing to do with SecurityPermission and ReflectionPermission...

Jochen Kalmbach [MVP VC++]

Jochen Kalmbach [MVP VC++]23-Jun-04 1:57

23-Jun-04 1:57

Daniel Zaharia wrote:
The exception type is : System.Security.Policy.PolicyException
I think it has somthing to do with SecurityPermission and ReflectionPermission...

No, it has something to do with the Policy!!!

So either change your policy to allow executiong ffrom network shares or change the way you load your assembly!

Heath Stewart23-Jun-04 4:19

23-Jun-04 4:19

You need to add a code group with a URL or Site membership condition with the necessary privileges (or simply FullTrust permissions) for the directory (or any parent directory) to allow execution from that directory.

For example, using a URL membership condition, use file://MYSERVER/SHARE/* or something like that. Be sure to add the asterisk at the end as a wildcard unless you only want to apply the policy to only one assembly (which, of course, you should include the assembly name).

You should read Understanding .NET Code Access Security[^] here on CodeProject for more information. It's a good read and a comprehensive resource of what you can find scattered throughout the .NET Framework SDK.

Microsoft MVP, Visual C#
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Daniel Zaharia23-Jun-04 4:37

23-Jun-04 4:37

Thanks!
Daniel.

Daniel Zaharia23-Jun-04 2:06

Re: Registration page woes

23-Jun-04 2:06

I get the same error even if i try to load the assembly from the same directory with the executing assembly.

objH=Activator.CreateInstanceFrom("Test.dll","TestClass");

Registration page woes

diptea22-Jun-04 23:18

diptea

22-Jun-04 23:18

Can some1 pls tell me what's wrong with my coding? thank u.

<%@ Page Language="C#" Debug="True" %>

int AddUser(string fname, string sname, string username, string password)
{
string connectionString = "server=\'\'; user id=\'\'; password=\'\'; databas" +
"e=\'\'";
System.Data.IDbConnection dbConnection = new System.Data.SqlClient.SqlConnection(connectionString);

string queryString = "INSERT INTO [Members] ([fname], [sname], [username], [password]) VALUES (@fname, " +
"@sname, @username, @password)";
System.Data.IDbCommand dbCommand = new System.Data.SqlClient.SqlCommand();
dbCommand.CommandText = queryString;
dbCommand.Connection = dbConnection;

System.Data.IDataParameter dbParam_fname = new System.Data.SqlClient.SqlParameter();
dbParam_fname.ParameterName = "@fname";
dbParam_fname.Value = fname;
dbParam_fname.DbType = System.Data.DbType.String;
dbCommand.Parameters.Add(dbParam_fname);
System.Data.IDataParameter dbParam_sname = new System.Data.SqlClient.SqlParameter();
dbParam_sname.ParameterName = "@sname";
dbParam_sname.Value = sname;
dbParam_sname.DbType = System.Data.DbType.String;
dbCommand.Parameters.Add(dbParam_sname);
System.Data.IDataParameter dbParam_username = new System.Data.SqlClient.SqlParameter();
dbParam_username.ParameterName = "@username";
dbParam_username.Value = username;
dbParam_username.DbType = System.Data.DbType.String;
dbCommand.Parameters.Add(dbParam_username);
System.Data.IDataParameter dbParam_password = new System.Data.SqlClient.SqlParameter();
dbParam_password.ParameterName = "@password";
dbParam_password.Value = password;
dbParam_password.DbType = System.Data.DbType.String;
dbCommand.Parameters.Add(dbParam_password);

int rowsAffected = 0;
dbConnection.Open();
try {
rowsAffected = dbCommand.ExecuteNonQuery();
}
finally {
dbConnection.Close();
}

return rowsAffected;
}

void Button1_Click(object sender, EventArgs e)
{
if AddUser(txtUserName.Text, txtUserPassword.Text) > 0
Message.Text = "Success";
else
Message.Text = "Failure";

}

<asp:label id="Label1" runat="server">User Name
<asp:textbox id="txtUserName" runat="server">

<asp:label id="Label2" runat="server">Password
<asp:textbox id="txtUserPassword" runat="server" textmode="Password">

<asp:label id="Message" runat="server">

<asp:button id="Button1" onclick="Button1_Click" runat="server" text="Register">

Colin Angus Mackay22-Jun-04 23:39

Colin Angus Mackay

22-Jun-04 23:39

You could try the ASP.NET forum[^]

Also, I don't think people are going to go through all that code looking for your error without an idea of what they are looking for. What error message do you get? What exacly goes wrong?

"You can have everything in life you want if you will just help enough other people get what they want." --Zig Ziglar

The Second EuroCPian Event will be in Brussels on the 4th of September

Can't manage to P/Invoke that Win32 API in .NET? Why not do interop the wiki way!

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To add a style in datagrid

HowRU22-Jun-04 23:05

HowRU

22-Jun-04 23:05

Hi ,
I want to add a style to the particular row's text in datagrid....as my datagrid is directly take the data from store procedure....

datagrid2.datasource=ds;
datagrid2.databind();

i want to add the style like whenever my mouse is over on that text i want to change the cursor as a hand.
In the css file i created a style for the hand named "hand" ....that's the same i m using in the following code....

datagrid2.Items[i].Cells[1].Style.Add("onmouseover","hand");

plz help me....

Thanks..

Re: To add a style in datagrid

Dave Kreskowiak23-Jun-04 4:05

Dave Kreskowiak

23-Jun-04 4:05

This question really belongs in the ASP.NET forum. It has nothing to do with the C# language itself, even though it's written in C#.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

A question about VBA and C#

Member 94012522-Jun-04 22:34

Member 940125

22-Jun-04 22:34

I use PowerPoint 2003 to record the following macro:

<br />
Sub Macro1()<br />
<br />
    Presentations.Add WithWindow:=msoTrue<br />
    ActiveWindow.View.GotoSlide Index:=ActivePresentation.Slides.Add(Index:=1, Layout:=ppLayoutText).SlideIndex<br />
    ActiveWindow.Selection.SlideRange.Shapes.AddPicture(FileName:="C:\SAVE\1_files\PSPage1.bmp", LinkToFile:=msoFalse, SaveWithDocument:=msoTrue, Left:=9, Top:=22, Width:=702, Height:=496).Select<br />
    ActiveWindow.View.Paste<br />
    With ActiveWindow.Selection.ShapeRange<br />
        .IncrementLeft 165.88<br />
        .IncrementTop 79.88<br />
    End With<br />
End Sub<br />

Now I want to implement it in my C# project,

<br />
ppApp = new PowerPoint.Application();<br />
objPres = ppApp.Presentations.Add(MsoTriState.msoTrue);<br />
objSlide = objPres.Slides.Add(1, PowerPoint.PpSlideLayout.ppLayoutText);<br />
objShape = objSlide.Shapes.AddPicture:="C:\\SAVE\\1_files\\PSPage1.bmp",MsoTriState.msoFalse,MsoTriState.msoTrue,9,22,702,496);<br />

I can add a slide and insert the Picture,
but I don't know how to do
ActiveWindow.View.Paste
to paste the object I write into clipboard,
Can anyone tell me how to do this in C#...??
Thanks a lot !!

Re: A question about VBA and C#

Heath Stewart23-Jun-04 4:06

how to add a style in datagrid

23-Jun-04 4:06

Anything you can do in VB6 (and older) you can do in a managed languages that supports COM interoperability (just about all of them, including C# and VB.NET). It's all based on OLE/COM automation described in a typelib that you can create an interop assembly from. This interop assembly is also known as a Runtime Callable Wrapper (RCW), which marshals calls from managed to unmanaged.

Unfortunately, though, it's not always as clear what to do as it is with VB (pre-.NET) because not all the type information is reserved. Properties and parameters start being the most basic class: object.

The primary interop assemblies (PIA - typically assemblies created by the developers of the corresponding typelib, and registered in a way that when you reference that typelib the PIA is used automatically instead of a new one being generated) for Office 2003 declare a DocumentWindow.View property, of type View. View.Paste is defined, so you would use:

ppApp.ActiveWindow.View.Paste();

Microsoft MVP, Visual C#
My Articles

Q: Coloring Schemes

yoaz22-Jun-04 22:08

yoaz

22-Jun-04 22:08

Hi there,
It's fairly easy to create a System.Drawing.Color with any RGB value one wishes. It's also easy to get this color HSB values by using System.Drawing.Color.GetBrightness, System.Drawing.Color.GetHue and System.Drawing.Color.GetSaturation member methods. Roll eyes | :rolleyes:

But can anyone help me create a color from Hue, Saturation and Brightness (HSB) values? Confused | :confused:

Re: Q: Coloring Schemes

Daniel M. Edwards23-Jun-04 3:02

Daniel M. Edwards

23-Jun-04 3:02

I found this snippet after a quick Google search. It's the 3rd block down.

http://www.syncfusion.com/FAQ/WinForms/FAQ_c85c.asp[^]

Re: Q: Coloring Schemes

yoaz23-Jun-04 4:29

yoaz

23-Jun-04 4:29

tks; i'm looking into it

HowRU22-Jun-04 21:46

HowRU

22-Jun-04 21:46

Hi ,
I want to add a style to the paricular row's text in datagrid....as my datagrid is directly take the data from store procedure....

datagrid2.datasource=ds;
datagrid2.databind();

i want to add the style like whenever my mouse is over on that text i want to change the cursor as a hand.
In the css file i created a style for the hand named "hand" ....that's the same i m using in the following code....

datagrid2.Items[i].Cells[1].Style.Add("onmouseover","hand");

plz help me....

Thanks..

Re: how to add a style in datagrid

dabuskol22-Jun-04 23:42

dabuskol

22-Jun-04 23:42

Hi,

This box is not enough if I will discuss to you all about datagrid. I suggest you visit the following site and you will find all the solutions and code that you want.

http://aspnet.4guysfromrolla.com/articles/042402-1.aspx
http://wwww.datagridgirl.com

Q1. datagrid2.Items[i].Cells[1].Style.Add("onmouseover","hand");
A1. Try to go to this page "MOUSEOVER coloring and CLick Datagrid"
http://aspalliance.com/articleViewer.aspx?aId=30&pId=1

I hope this will help you.

Good Luck
/Dabuskol

move AxPdfLib.AxPdf

fatidarya22-Jun-04 21:29

fatidarya

22-Jun-04 21:29

how do i move AxPdfLib.AxPdf on the form ?
it dosent know mousehandlers.

Re: move AxPdfLib.AxPdf

Heath Stewart23-Jun-04 3:19

23-Jun-04 3:19

As I mentioned with one of your earlier questions, an ActiveX control contains it's own message queue and .NET has no control over that. If there are events exposed on the ActiveX control, those should be declared by the RCW (Runtime Callable Wrapper) and you can use those. If it doesn't have them, there's really nothing you can do. This is not a .NET Control, merely an ActiveX control hosted within a .NET Control that does little more than marshal calls from managed to unmanaged code.

Microsoft MVP, Visual C#
My Articles

Re: move AxPdfLib.AxPdf

fatidarya25-Jun-04 19:02

fatidarya

25-Jun-04 19:02

thanks
please help more.how can i access to RCW .and please a tell me address of related sample .

Re: move AxPdfLib.AxPdf

Heath Stewart26-Jun-04 13:59