I have a website in asp.net 2.0 which write some thing on a file. But at the same time if another user hit that site it does not work till the first one operation on the file completed after that second one can do operation with the files.
AppConfiguration appConfiguration = new AppConfiguration();
string LogFile =String.Empty;
string sLogFormat =string.Empty;
string sErrorTime =string.Empty;
[Code]....
How to multiple search in single textbox using autocomplete extender.. or may use an other method.Â
View 1 RepliesIs it possible to write multiple queries on a single button click? if yes then how?
View 5 RepliesI have a function that finds a files MIME type for download purposes. I use this DllImport:
Code:
[DllImport("urlmon.dll", CharSet = CharSet.Unicode, ExactSpelling = true, SetLastError = false)]
static extern int FindMimeFromData(IntPtr pBC,
[MarshalAs(UnmanagedType.LPWStr)] string pwzUrl,
[MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.I1, SizeParamIndex = 3)] byte[] pBuffer,
int cbSize,
[MarshalAs(UnmanagedType.LPWStr)] string pwzMimeProposed,
int dwMimeFlags,
out IntPtr ppwzMimeOut,
int dwReserved);
I use this function:
Code:
#region GetMimeFromFile(string)
public static string GetMimeFromFile(string file)
{
IntPtr mimeout;
if (!File.Exists(file))
{
throw new FileNotFoundException(file + " not found.");
} //if
int maxContent = (int)new FileInfo(file).Length;
if (maxContent > 4096)
{
maxContent = 4096;
} //if
byte[] buff = new byte[maxContent];
using (FileStream fs = new FileStream(file, FileMode.Open))
{
fs.Read(buff, 0, maxContent);
} //using
int result = FindMimeFromData(IntPtr.Zero, file, buff, maxContent, null, 0, out mimeout, 0);
string mime = Marshal.PtrToStringUni(mimeout);
Marshal.FreeCoTaskMem(mimeout);
return mime;
}
#endregion
Locally, it runs fine. However, when I put it on a GoDaddy server, I get the error:
"The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file. "
My stracktrace points to line 256, which is the ending french bracket of my GetMimiFromFile function.
I'm a asp.net newbie trying to figure out how to do the following. I have a datatable. I want to extract the first row and perform a certain operation and a different operation on the remaining rows. How would I loop through the datatable to do this?
View 5 RepliesI need to perform update operation in a datatable without using loops. Is there any way to perform update in a datatabel...
View 3 RepliesI use dynamic currency symbol(Doller,£,etc.,) for that the web config is updated in locally but in site I can not modifiy the web config file and I get the following error
"Attempted to perform an unauthorized operation."
In My Project We Filter Dataview Which Contail Integer and string value
sort data likes this
dvv.RowFilter = filterfor + " Like " + SearchExpression;
but when integer value is encounter Error occurredÂ
Cannot perform 'like' operation on system.int64 and system.string
i have an dll file which is data access layer of my application.
i am getting this exception while accessing databse
Description:
The application attempted to perform an operation not allowed by the security policy. To grant this application the required permission contact your system administrator or change the application's trust level in the configuration file.
Exception Details:
System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
I need to dispay confirm box on server Side.. senario is like Im Trying To upload Image During Upload Im Checking some properties like Image type,image size, etc.. While Uploading i want to check properties like
if(type=="xxxx")
{
confirmbox("Â ");
if(confirmvalue=="yes")
{
next condition
}
else
{
exit ;
}
}
like this i want check different properies of file.. how can i do this
I have read plenty of tutorials on taking a datagrid to a text file, but I haven't seen anything about taking a single cell from a datagrid, formatting it, and writing it to a text file. Is this possible, am I going about it wrong?
View 3 RepliesError:Â
Security Exception
Description: The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file. Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.Local its run fine. when i place in iis. it throw this exception.
i have been assigned a task to develop ICR in asp.net using c# i have no idea to implement it please give me idea from scratch, and also how to write code and which name space is used to perform this task
View 10 RepliesI've created a set of CrystalReports (*.rpt files) for an ASP.NET web app on a development server. I call each report using the following code:
[Code]....
When I transfer the *.rpt files to a different server, the reports display data from the development server; even when I change "Constants.DatabaseName" to point to the new server. It seems like the *.rpt file saves the database connection information from the ODBC File DNS used when creating the report.Has anyone experienced this problem? I'm looking for a solution so I don't have to create multiple copies of my *.rpt files for each server environment (i.e., Dev, Test and Production servers).
How to write self hosting for wcf service with multiple svc file ServiceHost myServiceHost = null;
View 1 RepliesI wanna search operation on the basis of the keyword write in the text box and search the subsequent result from the database..
View 2 RepliesI have a stored procedure that returns 3 tables within the single recordset it returns. If I set a SqlDataSource to get data from this procedure, it works, but it only returns the first table. I want to have a GridView display the data from the 2nd or 3rd table using a SqlDataSource, but I can't figure out how to specify a particular table.
While there are some posts discussing this out there, I can't get a definitive answer about whether or not this is even possible (?). In a worst-case scenario, I can create another SP that only returns the 3rd table - but that creates a little maintenance headache that I would prefer to avoid.
I was wondering whether in ASP.NET it is possible to change properties of bunch of controls in one operation. Of course there are probably many ways around this, but does anybody know an elegant solution to this?
Example pseudo-code
First Name
<asp:TextBox runat="server" ID="tbxFirstName" ControlGroup="Editable" />
<asp:Label runat="server" ID="lblFirstName" ControlGroup="ReadOnly" />
Last Name
<asp:TextBox runat="server" ID="tbxLastName" ControlGroup="Editable" />
<asp:Label runat="server" ID="lblLastName" ControlGroup="ReadOnly" />
protected void ChageMode(bool isReadOnly)
{
ControlGroups["Editable"].ForEach(c => c.Visible = !isReadOnly);
ControlGroups["ReadOnly"].ForEach(c => c.Visible = isReadOnly);
}
This is my first forray into ASP.NET MVC, having been doing WebForms for nearly 6 years now. I've read through various tutorials and guides on getting started with MVC, but I've a few questions about how you're meant to do things:
UserControls for entities
In an application I wrote a few years ago (using WebForms) there were many entities that had an associated postal address (which existed as an instance of an Address class), so I created a UserControl that contained fields for working with addresses. During the page lifecycle I would pass the business object's .Address property to the UserControl for display and for population upon a successful and valid postback. How would I do something like this in MVC? My current project has a similar situation where common sets of fields are repeated throughout the application and all 'map' to the same class.
Modifying the page/view on 'postback'
Say I'm working on a data-entry form for an online B2B ordering system, where the user manually enters order items into a series of textboxes arranged in a table. The system can only provide so-many textboxes at a time (usually 5 or 10). If the user ran out of textboxes they would click an "Add more rows" button that performed a postback that was caught by that button's server-side .Click event handler. The page's class would then add more rows to the page; ASP.NET's stateful nature made this easy to implement. But in MVC there is no ViewState and I haven't found much information about how you'd do this, or anything like this. All of the tutorials and guides assume a form posting is only for data submission.
Multiple tasks per page/form
In a similar vein to the above, how do you create views that perform multiple tasks? In my above example I cited a webform that had two buttons: one to submit the form for actual processing, and another button that just modified the page (by adding more data-entry rows).Given that Controllers' actions are bound to URIs rather than what combination of fields were submitted, does this mean that I would have to interpret the posted data myself and branch based on that?
Componentised self-contained controls (e.g. sidebar forms)
Finally, in many web applications you have the main form in the middle, but also things on the periphary of the page (e.g. a sidebar) that might have their own logic. For example, in one WebForms application I wrote last year there was a 'Quick contact' form in a UserControl located elsewhere on the page. When the user clicked the form's button the UserControl's logic handled the postback details independently of the page containing the UserControl (but there was only one <form> element in the whole rendered page). The user was returned to the page they clicked the button on, with everything in identical state as to how it was before, exccept for the UserControl which reported that the email was sent. Again, MVC's stateless nature would make something like this hard to implement, unless there are some techniques not covered in the tutorials?
I have huge excel files that I have to open from web browser. It takes several minutes to load huge file. Is it possible to open a single worksheet (single tab) at a time from excel file that contains many worksheets? I have to do this using C# / asp.net MVC
View 5 RepliesI have a problem while inserting data into an Access 2003 .mdb database.
Exception:
Multiple-step OLE DB operation generated errors. Check each OLE DB status value, if available. No work was done.
My connection string in
[Code]....
file:
<connectionStrings> <add name="UI.Properties.Settings.ZangolehDbConnectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|DbangolehDb.mdb;" providerName="System.Data.OleDb" /> </connectionStrings>
Whats this error is and whats the solution. Multiple-step OLEDB Operation Generated Error.
View 5 Repliesbelow written question :
1.) What is the name of the OS process in which App Domain resides.
2.)if suppose There are Three Windows application hosted on a same envoirment and two instance is working for each application at a Time, means now total instance are six .what will happen among the below written cases :
a.) There will be six different app domain in a single OS process
b.) There will three app domain(one for each application) in a single OS process and some Parallel thread will be executed in each app domain for another instance.
c.) There will be Three OS process corresponding to each application.
3.) If eveything will remain same except there are three web application in place of windows in point 2, will there be any change in functioning.
I have a question in gridview, I want to combine my two or more records into a single cell with two rowsfor Example i have a ID, Name, Year Start, and Year End for Column name in database and i want call it into my gridview that the Year Start and Year End will combine to Year like:
In Database
ID Name Year Start Year End
1 Yourname 2010 2015
In Gridview:
ID Name Year
1 Yourname 2010 2015
in a year column i want it to two row..
I want to bind three column with one row in gridview in asp.net with c#,
i want like this,Â
Name | Info
----------------------
name | lastname
    | phone number
    | address
I get this by default
name | last name | phone number | addressÂ