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This could be a timeout, because the server application needs too long for its answer. It could also be a sporadic network problem which your client application doesn't handle. But your question is too incomplete to give a better answer.
This statement is false.
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Hello.
Am not sure about this, hope someone can provide a little help.
I've got a folder with a variety of pre-defined Crystal Reports which will need to be instantiated depending on some user input. This folder is not part of the solution, it's just sitting on a server drive.
So assuming the input is rptTest, I need to instantiate the report called rptTest. If the app can't find a match, it alerts the user.
Is it Activator.CreateInstance I need to accomplish this or is it simply not possible? If it is, can anyone provide a code sample. I know I need an assemblyname and a typename for one but which would be the user input and what would the other be?
Hope I'm being clear and that someone can help.
Thanks in advance
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Activator.CreateInstance is used to create instances of C#/.Net types at runtime. This allows you to switch which class gets created based on runtime information (user input or information provided by virtual methods, for example).
abstract class A {}
class B : A {}
class C : A {}
A CreateSomething(string classname){
return Activator.CreateInstance(Type.GetType(classname));
}
A CreateSomethingOfTheSameType(A template){
return Activator.CreateInstance(template.GetType());
}
I don't believe Crystal Reports are saved as .Net classes and thus this won't be the correct approach. I would imagine that Crystal allows you to load reports from file.
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Here's what I use:
System.IO.FileInfo Defile
...
CrystalDecisions.CrystalReports.Engine.ReportDocument crRpt =
new CrystalDecisions.CrystalReports.Engine.ReportDocument() ;
crRpt.Load ( Defile.FullName ) ;
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Thanks for the answers guys, much appreciated.
Just one more thing, is there a way I can instantiate a custom dataset on the fly as well. Similar to the crystal reports, I've another folder which contains XSDs to use as the datasources for the reports. Could they also be generated according to user input?
Thanks again for your help so far.
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You can construct a DataSet manually at runtime (adding tables, columns, rows etc), or you can use DataSet.ReadXml.
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You, Sir, are a very good man.
I forgot totally about calling the ReadXml method, saves me from having to turn everything into an XSD and can simply populate the crystal report using it instead.
Bob for President.
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Hi,
how can I retrieve values from a textBox in another screen after the user set / send it
In the first screen, I have a TextBox, mNombre50TextBox, the user fills in the number of tickets they want in the textBox.the sum is displayed (by calculating with jQuery) in another textBox, mTotal50TextBox, and the total bill is in 3th (another) textBox, ,mMontantTextBox...
Here is my code in aspx (Front end)
<script type="text/javascript">
$(document).ready(function () {
$("#<%=mNombre50TextBox.ClientID %>").keyup(function () {
$("#<%=mTotal50TextBox.ClientID %>").attr("value", $("#<%=mNombre50TextBox.ClientID %>").attr("value") * 50);
$("#<%=mMontantTextBox.ClientID %>").attr("value", $("#<%=mTotal50TextBox.ClientID %>").attr("value"));
});
$("#<%=mNombre100donnerTextBox.ClientID %>").keyup(function () {
$("#<%=mTotal100donnerTextBox.ClientID %>").attr("value", $("#<%=mNombre100donnerTextBox.ClientID %>").attr("value") * 100);
$("#<%=mMontantTextBox.ClientID %>").attr("value", parseInt($("#<%=mTotal50TextBox.ClientID %>").attr("value")) + parseInt($("#<%=mTotal100donnerTextBox.ClientID %>").attr("value")));
});
});
</script>
<div class="conteneur_lbl">
<div class="lbl">
<asp:Label ID="billets50" runat="server">Nombre de billet(s) à 50 $ :</asp:Label>
</div>
<div class="nmbr_txtbox">
<asp:TextBox ID="mNombre50TextBox" Text="0" runat="server" MaxLength="3" Width="35px"></asp:TextBox>
</div>
<div class="dollars_txtbx">
somme partielle :
<asp:TextBox ID="mTotal50TextBox" runat="server" Text="0" MaxLength="6" ReadOnly="True"></asp:TextBox><span
class="pour_cent_dollars">,00$ </span>
</div>
</div>
<div class="conteneur_lbl">
<div class="lbl">
<asp:Label ID="billets100donner" runat="server">Nombre de billet(s) à donner à 100 $ :</asp:Label>
</div>
<div class="nmbr_txtbox">
<asp:TextBox ID="mNombre100donnerTextBox" Text="0" runat="server" MaxLength="3" Width="35px"></asp:TextBox>
</div>
<div class="dollars_txtbx">
somme partielle :
<asp:TextBox ID="mTotal100donnerTextBox" Text="0" runat="server" MaxLength="6" ReadOnly="True"></asp:TextBox><span
class="pour_cent_dollars">,00$ </span>
</div>
</div>
<div class="conteneur_lbl">
<div class="lbl">
<asp:Label ID="OfferLabel" runat="server">Montant total :</asp:Label>
</div>
<div class="txtbx">
<asp:TextBox ID="mMontantTextBox" runat="server" ReadOnly="True"></asp:TextBox>
,00$
</div>
</div>
Then (when the user clicks a button), the information is backuped for the following screen:
Here is my code in codebehind C#
private void SetPageState()
{
mFormulairePageState.MontantContribution = mMontantTextBox.Text;
SavePageState();
}
public struct FormulairePageState
{
public int SelectedIndex;
public string MontantContribution;
}
In the second screen, I display the sum in a "Label", mPriceLabel,!
Here is my code in codebehind C#
private void LoadLabels()
{
object FormulairePageState = Session["FormulairePage"];
cost = s.MontantContribution;
double doubleVal = 0.0;
if (Double.TryParse(cost, out doubleVal))
{
newVal = (int)doubleVal * 100;
mPriceLabel.Text = newVal.ToString();
}
But in my label, mPriceLabel, there is nothing, it is empty.  Comemnt I can display the sum in this screen ?
I did a test on my first screen: I removed "[ReadOnly="True"]" in my TextBox "mMontantTextBox"... Then I typed the numbers directly in the textBox, mMontantTextBox. In this case, these values are displayed in the label on the second screen!
Could you help me, please : Comemnt I can display the sum in 2sd screen ?
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This really should have been placed in the ASP.NET forum
Where is this being set? Session["FormulairePage"]
I know the language. I've read a book. - _Madmatt
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You can find the textBox,then get the value easily.
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Really!? Wow, I hadn't even thought of that 
The question was for the OP. If you bothered to actually look at the code that was posted I can't find where the session variable is actually being set. But then you are obviously better and wiser than I. Please teach me.
I know the language. I've read a book. - _Madmatt
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Because you're setting the text in that field by JavaScript, it's probably not getting sent in a postback. Show us the code on the button that saves the state.
Also, you should store the number of $50 and $100 tickets in the back end, and recalculate the price. If you read the price from postback, it is trivial to modify the post request so that you buy 3 $50 tickets for $2.
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I have a table which have a filed which is xml type, and some more fields such as name and id.i want to read the xml field as well as the other fields in C#, i searched and got this
XmlReader rdr = cmd.ExecuteXmlReader();
but i want to get the other data in the table too. is there any option to do this using one command , or do i have to call two times to get the data.
any idea.
thanks in advance.
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XmlDocument document = new XmlDocument();
using (SqlDataReader dr = oComm.ExecuteReader())
{
if (dr.Read())
{
if (!dr.IsDBNull(0))
document.Load(dr.GetSqlXml(0).CreateReader());
}
}
I think this is what you want
abhinav
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Using a windows app to batch run a DOS program.
Need to wait until the DOS app has finished before going on with the next file.
Using:
Process.Start(thecommand, thearguments);
System.Diagnostics.Process p = System.Diagnostics.Process.GetCurrentProcess();
while (!p.HasExited)
{
aaa=5;
}
but it seems to be waiting for my windows app to end, not the DOS app. I can see my DOS app running in a DOS window, and it closes when finished (it takes about a minute to run), but my app sits there in the while loop. I put a breakpoint at aaa = 5; and the app definitely sits in that loop.
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Uh, that's because you're assigning p to the current process, i.e. the one you are running! I think you want
Process p = Process.Start(thecommand, thearguments);
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I must have misunderstood the examples in the answers to other similar questions!!
Working now.
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What is better in terms of good coding practices:
protected virtual void RenderFilledHead(DrawingContext drawingContext)
{
double y = NoteVerticalPosition;
double yRadius = HeadYRadius * 1.1;
double xRadius = HeadXRadius * 1.2;
drawingContext.DrawEllipse(Brushes.Black, NoteHeadPen, new Point(xRadius / 2 + XOffset + 4.5, y), xRadius - 1, yRadius);
}
protected virtual void RenderEmptyHead(DrawingContext drawingContext)
{
double y = NoteVerticalPosition;
double yRadius = HeadYRadius * 1;
double xRadius = HeadXRadius * 1;
drawingContext.DrawEllipse(Brushes.Transparent, NoteBeamPen, new Point(xRadius / 2 + XOffset + 4.5, y), xRadius - 1, yRadius);
}
XOR
protected virtual void RenderHead(DrawingContext drawingContext, NoteHeadTypes type)
{
double y = NoteVerticalPosition;
double xRadius=0, yRadius=0;
switch (type)
{
case NoteHeadTypes.Filled:
yRadius = HeadYRadius * 1.1;
xRadius = HeadXRadius * 1.2;
drawingContext.DrawEllipse(Brushes.Black, NoteHeadPen, new Point(xRadius / 2 + XOffset + 4.5, y), xRadius - 1, yRadius)
break;
case NoteHeadTypes.Empty:
yRadius = HeadYRadius;
xRadius = HeadXRadius;
drawingContext.DrawEllipse(Brushes.Transparent, NoteBeamPen, new Point(xRadius / 2 + XOffset + 4.5, y), xRadius - 1, yRadius);
default:
break;
}
}
NOTE 1: there won't be any more HeadTypes probably.
NODE 2: No, it is not about empty or filled human heads, it's about musical notation 
Greetings - Jacek
EDIT: added "*1" to emphasize that it is a factor as good as '1.2'
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Probably a matter of taste, but I like the second one better.
That shows that apart from different radiusses you are dealing with the same thing. That's harder to see with the first approach.
V.
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What about the following:
protected virtual void RenderHead(DrawingContext drawingContext, NoteHeadTypes type)
{
double y = NoteVerticalPosition;
double xRadius=HeadXRadius;
double yRadius=HeadYRadius;
Pen myPen = NoteBeamPen;
Brush myBrush = Brushes.Transparent;
switch (type)
{
case NoteHeadTypes.Filled:
yRadius *= 1.1;
xRadius *= 1.2;
myPen = NoteHeadPen;
myBrush = Brushes.Black;
break;
default:
break;
}
drawingContext.DrawEllipse(myBrush, myPen, new Point(xRadius / 2 + XOffset + 4.5, y), xRadius - 1, yRadius);
}[Edited]myPen wasn't allocated via a constructor, so it shouldn't be disposed, and I'd missed the alternate brush.
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Sniped!
I think you actually don't want to dispose the pen in this case, though, because it's being read out of a global variable which is presumably caching it.
(Also, the brush is different for the two cases, like the pen.)
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I missed the brushes case, and you're right - the Pen shouldn't be disposed. For some reason I thought I'd newed it.
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I don't like it because it prefers Brushes.Transparent over Brushes.Black. Both brushes are equal. Here, if switch goes to the default case, then Brushes.Transparent would be used despite there isn't any reason to use it and not Brushes.Pink. The same with radius factors -- factor '1.2' isn't more special than '1'.
Greetings - Jacek
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Fair point, but you could simply exit out in the default case (I've never been a fan of default in switch statements - it's always seemed that it should be for the error case).
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Pete O'Hanlon wrote: Fair point, but you could simply exit out in the default case
Oh these sexy quotation boxes.
Well, it still visually suggests that Transparent is a default value, because brush is assigned twice. Oh and redutant assignment == wasted CPU cycles.
Greetings - Jacek
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