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Ismail
Engaged Sweeper II
Hello, I'm having a bit of trouble on the web interface. I keep getting the following errors which makes accessing the website impossible:

Server Error in '/lansweeper32' Application.
Conversion from type 'DBNull' to type 'String' is not valid.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidCastException: Conversion from type 'DBNull' to type 'String' is not valid.

Source Error:

The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please follow one of the below steps, then request the URL:

1. Add a "Debug=true" directive at the top of the file that generated the error. Example:

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

or:

2) Add the following section to the configuration file of your application:

<configuration>
<system.web>
<compilation debug="true"/>
</system.web>
</configuration>

Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.

Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.

Stack Trace:

[InvalidCastException: Conversion from type 'DBNull' to type 'String' is not valid.]
Microsoft.VisualBasic.CompilerServices.Conversions.ToString(Object Value) +622
ASP.state_aspx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) +526
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +98
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +21
System.Web.UI.Page.Render(HtmlTextWriter writer) +27
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +53
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +280
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +24
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +8432


Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42


Please Advise.
2 REPLIES 2
Hemoco
Lansweeper Alumni
Could you post an error out of the eventviewer please.
Ismail
Engaged Sweeper II
Ok i rectified the problem which caused that error using search button on the forum. I removed NULL from tblcomputers but now when I reload the default page It pops up for a second then my IIS service stops and displays an error.

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