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Each thread has to go through a list of names connecting to the internet. So I didn't wanna use 1 thread to do like 4000 names that would be slow.
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Do it the other way around. Put the names in a synchronised queue, and let the threads get the names from it.
Despite everything, the person most likely to be fooling you next is yourself.
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I have an MDI application with, obviously, an MDI container form that includes a MenuStrip that is docked to the top of the form. By clicking on various defined ToolStripMenuItems, a variety of child forms can be opened that are smaller than the MDI container forms window, but can be maximized to fill the window. All of these forms include the same icon that is loaded in each form's load event from the resource properties with code similar to...
this.Icon = MyProg.Properties.Resources.IconName;
For some reason when I maximize any of the child forms, instead of the child form's icon and control box merging with the MenuStrip of the MDI container, a separate line above the MenuStrip is being created with just the icon and the control box. I know I am missing the forest for the trees on why this is occuring, because I have another MDI app where I do not have this problem, and I can't figure out what is different between the two. Does anyone who actually read this far have any ideas why this might be occurring?
Thanks.
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Just as I suspected, I am an idiot. I simply did not have the MainMenuStrip property set on my MDI container to the MenuStrip I had placed on the MDI form. I'm a moron, but at least the MDI app is working as expected again.
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I have Winforms DataGridView whose DataSource Rids is
TableListCollection<TRow> derived from BindingList.
It is used to edit invoice rows.
If user presses Revert button, my application reads original rows from
server database:
List<TRow> tr;<br />
tr = q.Where(r => r.Dokumnr == Dok.Dokumnr)<br />
.OrderBy(r => r.Reanr).ToList();<br />
Rids = new TableListCollection<TRow>(Grid.RowTable, tr);<br />
Rids.ResetBindings();
However DataGridView still shows old rows.
I tried to re-assign DataGridView DataSource
DataSource = Rids;
but this causes DataGridView to lost all settings
How to refresh DataGridView after its BindingList is re-loaded from DataBase ?
Andrus
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I have a dll written in unmanaged c++ that I need to call. Currently, it is embedded inside the main assembly as an resource, and is extracted when it needs to be called. This call is done by using DllImport, for example:
[DllImport("CppImplementation.dll")]
public unsafe static extern bool AreEqual(byte* lhs, byte* rhs, int len);
Is there any way to tell DllImport to look inside the main assembly's resources, so that it is not necessary to extract the unmanaged assembly into a file before calling? Or is there some other efficient method to call these unmanaged functions?
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I'm creating a simple program that prints reports. So far i do understand the graphics the print classes and print previews provided by C# but everything is so low level and it would be time consuming for me to construct a generic class that would do automatic page numbering with headers and footers and line spacing and tables(rectangles) and changing of fonts and sizes and colors of text and images and etc.. Can you direct me to a ready made class that I could make use of?
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Hi,
I have a simple class library (Common.dll) that contains one public enum
public enum Product {
Deliver = 0,
Order,
MSM
}
I have a web service that uses Common.dll
<pre>[WebMethod]
public string GetProductDescription(Common.Product product) {
if(product == Common.Product.Deliver)
{
return "Deliver";
}
else if(product == Common.Product.Order){
return "Order";
}
else if(product == Common.Product.MSM){
return "MSM";
}
return string.Empty;
}</pre>
The web service compiles without problems.
I have a simple windows forms application that has a reference to Common.dll and to the web service
I have a method which calls the web service GetProductDescription
<pre>private string GetProductDescription(Common.Product product)
{
return ws.GetProductDescription(product);
}
</pre>
I get a compiler error saying "cannot convert from 'Common.Product' to 'WindowsApplication1.localhost.Product'"
I looked at the generated code for the web reference (reference.cs) and the Product enum has been defined so it seems that it is completely ignoring the enum from Common.dll
<pre>/// <remarks/>
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Xml", "2.0.50727.3053")]
[System.SerializableAttribute()]
[System.Xml.Serialization.XmlTypeAttribute(Namespace="http://www.itutopia.net/WebSync3")]
public enum DataBaseAction {
/// <remarks/>
Insert,
/// <remarks/>
Update,
/// <remarks/>
Delete,
}</pre>
I'm pretty stumped as to what's causing this to happen so any advice or suggestions will be well appreciated.
Thanks,
dlarkin77
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What's your definition for WindowsApplication1.localhost.Product?
How did you bugger up your formatting? It looks like you tried to do it right, but something is getting the way.
"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
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Hi,
I accidentally posted the definition for WindowsApplication1.localhost.DatabaseAction instead of the one for Product.
It's defined as follows:
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.Xml", "2.0.50727.3053")]
[System.SerializableAttribute()]
[System.Xml.Serialization.XmlTypeAttribute(Namespace="http://www.itutopia.net/WebSync3")]
public enum Product {
Deliver,
Order,
MSM,
}
The formatting thing is a bit weird. I wrapped the code segment in a code block and checked the 'Ignore HTML tags' option. Unless I'm mistaken that's all I need to do to format it correctly. Is there some extra step I need to make?
Thanks,
dlarkin77
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As to your problem, the only thing I can think of is that you may have to convert the enum to an int, return the int to the calling application, and let the calling app convert it back to a Product enum. Here's a function I use to go back to an enum from an integer value. It ensures that enum "value" exists within the specified enum type, thereby never returning an invalid enum value.
public static T IntToEnum<t>(int value, T defaultValue)
{
T enumValue = (Enum.IsDefined(typeof(T), value)) ? (T)(object)value : defaultValue;
return enumValue;
}
</t>
The formatting thing is a site bug.
"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
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Hi,
I figured I could probably do something like what you've suggested but I was hoping that I wouldn't have to go down that road.
Is there any particular reason that the enum is being redefined in the generated stub for the web service? Why doesn't the web service use the definition in the class library that it references?
Thanks,
dlarkin77
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I think the problem is that since the web service is a different binary, the calling application doesn't know what to do with the value. I make it a habit to only return intrinsic types and DataTables from web services. I convert enums to int before returning them.
Have you looked at the returned value in the debugger? You might have gotten lucky and it might already be an int.
John's 1st rule of programming: If there are several ways to accomplish the same task, the one that creates the most effort on the part of the programmer is probably to only way to do it right.
"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
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John's first rule seems to ring true. I guess I'll go with the approach you recommend. Thank very much for you help.
dlarkin77
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The problem is that even though you have the same assembly (common.dll) on both sides, the classes are different. When WebService proxy is created at client side, Visual Studio creates new classes for all classes returned by WebService (based on WSDL).
I solved this by not using Visual Studio Web References. Instead I use WSDL.exe on client side and create the proxy class manually. After the creation is done I strip away all the class definitions that are created for parameters and convert the parameters used in web service calls to classes from common assembly. Then I include this file to the project.
For more info on WSDL, go to Web Services Description Language Tool (Wsdl.exe)[^]
Hope this helps,
Mika
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i have one excel file & wants to insert that file with records in to data table???
can any one help me to do so????
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Your question is not focused but the general structure can be as follows:
Open the file using an OleDbConnection (you can find the connection string at connectionstrings.com)
Read the contents into a DataTable using a SELECT * FROM [table_name]
Connect to the db you wish to export the data to
Create the table and columns
Write the table
Natza Mitzi
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An easy way is to use FileHelpers. Check site www.filehelpers.com[^]
Excellence is doing ordinary things extraordinarily well.
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i design report with crystal report embedded in vs 2005. report work correctly in my computer and then i make setup for my application and run other computer but recive exeption : could not load file or assembly 'crystaldecision.windows.forms, version=10.2.3600.0,...
please help me
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You need to include all referenced assemblies in your setup. As the exception says you are missing at least crystaldecision.windows.forms
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Hello friends,
I have a question that is not completely about c# but it relates:
I am going to write an administrative program for a client-server network.
this program is for comminucating and sending the packets through network, from server to clients and viceversa.
but there is a question: for this kind of comminucations, c# is more respondent or java? which of these two languages is better for write the program? Is there any differences? What are them?
please guide me.
thanks
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Hi,
Probably no one will say C# is better than Java or vice versa as you guess but I have been writing server/client applications for a long time and I can say that .NET IDE is very stable and .NET framework has good and easy to use server/client classes.
You can develop client/server applications very easily with .NET C#.
Good luck
zafer
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thanks for your kind response,
may I know what kind of resources do you offer me to understand fundamentals, source code and rather articles. because those source codes I found are a bit difficult and half-explained.
thanks again
modified on Sunday, August 31, 2008 7:32 AM
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I suggest you to buy "C# in a Nutshell" written by "Joseph albahari". The book explains some basics of network programming.
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honestly, you may choose what language that you more understand to use, so you can manage them more easy and give fast response when errors occurred.
dhaim
programming is a hobby that make some money as side effect 
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