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Not really. It was Microsoft's implementation of Reflection that was brilliant
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Bear in mind that reflection is slow; you shouldn't use it unless you don't know what you want to run at compile time (e.g. you are running commands based on user input, or you do not have a compile time reference to the class or a relevant interface through which to bind statically).
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I have a simple WCF service with one interface and one class. When I add a service reference to my console apps, my WCF service class is not getting the expected name. My WCF service class name is service1 but it is exposed to the client end as Service1Client.
Why is the word "Client" being added before my actual class name? Do I need to add anything in my web.config for the service or in the app.config for the console end?
tbhattacharjee
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This is not a C# question, it would be better posted in the WCF forum.
One of these days I'm going to think of a really clever signature.
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Tridip Bhattacharjee wrote: Why is the word "Client" being added before my actual class name?
You can select any class name you want in the Add Service Reference dialog.
/ravi
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really i just do not understand what u trying to say. where we add service then we have to give service reference name. i gave service reference name say myfirstservice but when i type myfirstservice and dot then my class name is not appearing like "Myservice" rather a class name appear called "Myserviceclient" why the word "client" is being added before my actual class name and expose to client end.
tbhattacharjee
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My apologies Tridip, I read your question too hastily. 
/ravi
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anyway no prob.....thanks
tbhattacharjee
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I would verify your WCF Service Project Name and/or your Namespaces. Also, in the rare case that you renamed the WCF Service Project, I've found it's wise to just start over (i.e. delete the project and create a brand new one with the name you want) vs. figuring out all the things you need to also rename behind the scenes.
Russ
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Hi
I'm trying to build a program which will read and assign to variables the values from an XML file which goes like this (without the *):
<*n1> random number here <*/n1>
<*n2> random number here <*/n2>
I tried to use the XmlTextReader but I got an error when I passed the location of the file
("C:\\Documents and Settings\\myfile.xml") so I tried the XmlDocument and it's function SelectSingleNode("n1") but I got another error.
So what's the best way to get the values from this XML file? (I also want to show an error message if the XML file is not built as I mentioned (<*n1> <*/n1> <*n2> <*/n2>).
thanks
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gibsray wrote: but I got an error when I passed the location of the file
I tried the XmlDocument and it's function SelectSingleNode("n1") but I got another error.
We can't read your mind. What errors did you receive?
/ravi
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I very much doubt that your file is in the root of the Document and Settings folder. Perhaps you should double check that your path is valid.
I wasn't, now I am, then I won't be anymore.
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You need a root. You did not provide the error, so so not know what the exact issue is, but can only have one root node.
<items>
<*n1>random number here </*n1>
<*n2>random number here </*n2>
</items>
Of course this is not good xml either. XML will object to the *, and there is no * before the backslash.
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I have this code:
public static IQueryable<T> OrderBy<T>(
this IQueryable<T> source, string propertyName, string order)
{
var type = typeof(T);
var asc = order == "asc" ? true:false;
string methodName = asc ? "OrderBy" : "OrderByDescending";
var parameter = Expression.Parameter(type, "p");
var property = type.GetProperty(propertyName);
var propertyAccess = Expression.MakeMemberAccess(parameter, property);
var orderByExp = Expression.Lambda(propertyAccess, parameter);
MethodCallExpression resultExp = Expression.Call(typeof(Queryable), methodName,
new Type[] { type, property.PropertyType },
source.Expression, Expression.Quote(orderByExp));
return source.Provider.CreateQuery<T>(resultExp);
}
And i would like to extend it to allow child properties, like "Address.Street"
if i pass just a simple property it works nice... but i want to make it better and accept child object property to make order by.
Anyone knows how to modify it?
I tryed but no success... i don't know how to make it to find the child object property and create the MemberAccess with it 
Thanks!!
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public static IEnumerable<T> SortObject<T>(this IEnumerable<T> ObjectToSort, string SortBy)
{
if (ObjectToSort == null)
return null;
if (string.IsNullOrEmpty(SortBy) == true)
return null;
string[] tempSorts = SortBy.Split(',');
List<string> SortList = new List<string>();
bool inParanthese = false;
string addString = string.Empty;
foreach (string tempSort in tempSorts)
{
if ((tempSort.Contains("(") == true) && (tempSort.Contains(")") == false))
{
inParanthese = true;
}
else if (tempSort.Contains(")") == true)
{
inParanthese = false;
}
if (inParanthese == false)
{
if (string.IsNullOrEmpty(addString) == false)
{
SortList.Add(addString + "," + tempSort.Trim());
}
else
{
SortList.Add(tempSort);
}
addString = string.Empty;
}
else
{
if (string.IsNullOrEmpty(addString) == false)
addString += ",";
addString += tempSort.Trim();
}
}
string[] Sorts = SortList.ToArray();
bool Sorted = false;
foreach (string FieldSort in Sorts)
{
string[] SubSort = FieldSort.Trim().Split(' ');
string[] props = SubSort[0].Split('.');
Type type = typeof(T);
ParameterExpression arg = Expression.Parameter(type, "x");
Expression expr = arg;
foreach (string prop in props)
{
System.Reflection.PropertyInfo pi = type.GetProperty(prop);
if (pi != null)
{
Sorted = true;
expr = Expression.MakeMemberAccess(expr, pi);
type = pi.PropertyType;
}
else
{
string wholeMethod = prop;
if ((wholeMethod.Contains("(") == false) && (wholeMethod.Contains(")") == false))
{
wholeMethod += "()";
}
int firstParans = wholeMethod.IndexOf('(');
int lastParans = wholeMethod.LastIndexOf(')');
if ((firstParans > -1) && (lastParans > firstParans))
{
string methodname = wholeMethod.Substring(0, firstParans).Trim();
string paramList = wholeMethod.Substring(firstParans + 1, lastParans - (firstParans + 1));
System.Reflection.MethodInfo mi = null;
List<string> indParams = null;
if (paramList.Length > 0)
{
bool inDoubleQuotes = false;
bool inSingleQuotes = false;
string currParam = string.Empty;
indParams = new List<string>();
foreach (char c in paramList)
{
if (c == '\"')
{
if (inSingleQuotes == false)
{
inDoubleQuotes = !inDoubleQuotes;
}
currParam += c;
}
else if (c == '\'')
{
if (inDoubleQuotes == false)
{
inSingleQuotes = !inSingleQuotes;
}
currParam += c;
}
else if ((c == ',') && (inDoubleQuotes == false) && (inSingleQuotes == false))
{
if (string.IsNullOrEmpty(currParam) == false)
{
indParams.Add(currParam);
currParam = string.Empty;
}
}
else
{
currParam += c;
}
}
if ((string.IsNullOrEmpty(currParam) == false) && (inDoubleQuotes == false) &&
(inSingleQuotes == false))
{
indParams.Add(currParam);
}
Type[] methodTypes = new Type[indParams.Count];
Expression[] methodParams = new Expression[indParams.Count];
int paramTypeIndex = 0;
int intResult;
foreach (string indParam in indParams)
{
if (indParam[0] == '\'')
{
if ((indParam.Length == 3) && (indParam[2] == '\''))
{
methodTypes[paramTypeIndex] = typeof(char);
methodParams[paramTypeIndex] = Expression.Constant(indParam[1], typeof(char));
}
else
{
methodTypes[paramTypeIndex] = typeof(string);
methodParams[paramTypeIndex] = Expression.Constant(indParam, typeof(string));
}
}
else if (indParam[0] == '"')
{
methodTypes[paramTypeIndex] = typeof(string);
methodParams[paramTypeIndex] = Expression.Constant(indParam, typeof(string));
}
else if (int.TryParse(indParam, out intResult) == true)
{
methodTypes[paramTypeIndex] = typeof(int);
methodParams[paramTypeIndex] = Expression.Constant(intResult, typeof(int));
}
else
{
methodTypes[paramTypeIndex] = typeof(object);
methodParams[paramTypeIndex] = Expression.Constant(indParam);
}
paramTypeIndex++;
}
mi = type.GetMethod(methodname, methodTypes);
if (mi != null)
{
expr = Expression.Call(expr, mi, methodParams);
}
}
else
{
mi = type.GetMethod(methodname, System.Type.EmptyTypes);
if (mi != null)
{
expr = Expression.Call(expr, mi);
}
}
}
}
}
LambdaExpression lambda = Expression.Lambda(expr, arg);
if (Sorted == true)
{
IQueryable<T> queryableData = ObjectToSort.AsQueryable<T>();
if ((SubSort.Count() > 1) && (string.Compare(SubSort[1].Trim(), "desc", true) == 0))
{
MethodCallExpression MyExpr = Expression.Call(
typeof(Queryable), "OrderByDescending",
new Type[] { typeof(T), type },
queryableData.Expression, lambda);
IQueryable<T> results = queryableData.Provider.CreateQuery<T>(MyExpr);
try
{
results.Count();
ObjectToSort = results;
}
catch (Exception exc){}
}
else
{
MethodCallExpression MyExpr = Expression.Call(
typeof(Queryable), "OrderBy",
new Type[] { typeof(T), type },
queryableData.Expression, Expression.Quote(lambda));
IQueryable<T> results = queryableData.Provider.CreateQuery<T>(MyExpr);
try
{
results.Count();
ObjectToSort = results;
}
catch (Exception exc){}
}
}
}
if (Sorted == true)
{
return ObjectToSort;
}
else
{
return null;
}
}
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So my current project here at work will soon involve a parts ordering process. All is well with that. I'm just looking for all possible solutions for one portion of that process. Here is the gist of how it will work:
Worker #1: "Oh, I need to order this part."
------ * Select the part(s) using a CheckBox
------ * Click 'Place Order'
Worker #2 (picker) is in his station in some other work area. What needs to happen is when Worker #1 clicks 'Place Order', a label will print out at Worker #2's station with the appropriate information. Now, the label format and such is not the problem. What I am looking for is the most efficient method for monitoring the orders and printing the label automatically. I hope that was explained clearly.
When an order is placed it will be inserted into a table in Microsoft SQL Server 2008. And this is a WinForms application (C#, .NET v4.0).
The first potential solution I have contemplated: A Windows Service on Worker #2's station which monitors the database for new orders, set to check every so often (fairly short intervals).
My second potential solution: Share Worker #2's printer on the local network and connect to it via each station which can place orders.
What can you all suggest that may help me along? If you need anymore information please feel free to ask. I will gladly provide further information. 
djj55: Nice but may have a permission problem
Pete O'Hanlon: He has my permission to run it.
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Matt U. wrote: What I am looking for is the most efficient method for monitoring the orders and printing the label automatically. I hope that was explained clearly.
Depends on where your orders are stored.
Matt U. wrote: When an order is placed it will be inserted into a table in Microsoft SQL Server 2008.
Query Notification[^]
Matt U. wrote: The first potential solution I have contemplated: A Windows Service on Worker #2's station which monitors
I'd recommend a user-level application, not a service. It does not need to run when there's no user, since there's nowhere to display the notification and no-one to react.
Bastard Programmer from Hell 
if you can't read my code, try converting it here[^]
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Awesome, thanks a ton, Eddy! I'll be bookmarking the link and reading into it. I appreciate the help.
djj55: Nice but may have a permission problem
Pete O'Hanlon: He has my permission to run it.
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Also, I did forget to mention the fact that I am using LINQ To SQL. However, I found this article[^] which contains a basic explanation for using Query Notifications with LINQ To SQL. I had to make some modifications, as that article is several years old, but I got it working. Thanks again.
djj55: Nice but may have a permission problem
Pete O'Hanlon: He has my permission to run it.
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I'm having a problem ...
<br />
DataTable GetSomeData()<br />
{<br />
DataTable dtResult = null;<br />
IDbCommand Cmd = new SqlCommand(SQL, OldSqlConn);<br />
DataAdapter da = new DataAdapter(Cmd);<br />
DataSet ResultSet = new DataSet();<br />
da.Fill(ResultSet);<br />
<br />
if(ResultSet!=null)<br />
{<br />
dtResult = ResultSet.Tables(0);<br />
foreach(DataRow rw in dtResult.Rows)<br />
{<br />
if(SomeConditionMet) {<br />
rw["SomeCol"] = xxxxx; << Blows up here saying Column 'SomeCol' does not belong to table ABC (But I'm quite confident SomeCol is a column which should be returned by the SQL query... wondering if it's any issue with ADO.NET SqlConn caching or if OldSqlConn has any stale data at one point during the night app loses database connection or something... confused as I can't reproduce this on debugger and it happens only once in a month)<br />
}<br />
}<br />
}<br />
<br />
return dtResult;<br />
}<br />
dev
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Is there any reason you don't open your db connection before use and close just after?
Preferably with:
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
}
--
"My software never has bugs. It just develops random features."
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Put a breakpoint on the line that causes you a problem. Expand the DataRow in the watch window and inspect the values that are in there.
In other words, learn how to use the debugger. It would save you a lot of time coming up with random ideas about what the issue could be.
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