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I usually use this in a loop, and then I put the declaration in the loop too.
Is this good practice? Or is there no performance difference.
-- modified at 12:08 Monday 19th March, 2007
I threw together this code:
<br />
class Program<br />
{<br />
static void Main(string[] args)<br />
{<br />
Stopwatch sw = new Stopwatch();<br />
sw.Start();<br />
test1();<br />
sw.Stop();<br />
Console.WriteLine(sw.Elapsed);<br />
sw.Reset();<br />
sw.Start();<br />
test2();<br />
sw.Stop();<br />
Console.WriteLine(sw.Elapsed);<br />
Console.Read();<br />
}<br />
<br />
static void test1()<br />
{<br />
<br />
String testString;<br />
for (int i = 0; i < 50000000; i++)<br />
{<br />
testString = i.ToString();<br />
}<br />
}<br />
<br />
static void test2()<br />
{<br />
for (int i = 0; i < 50000000; i++)<br />
{<br />
String testString;<br />
testString = i.ToString();<br />
} <br />
}<br />
}<br />
pretty fun (clogs for about 17 secs on my pc)... but not really conclusive. I asked a MSIL guru about it. You probably don't care even half as much as I do, but I like these kinds of perf. things.
public object BufferOverFlow<br />
{<br />
__get { return BufferOverFlow; }<br />
__set { BufferOverFlow = value; }<br />
}
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if i add new control at runtime suppose three buttons how can i get the click event of these three buttons.
Mohinder Singh
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if i do this way for the button then i get three buttons but how can i have the click event of these three buttons .
Mohinder Singh
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By setting the event in code.
LinkButton.Click += new System.EventHandler(method);
in VS2005 Intellisense does most of the thinking for you.
public object BufferOverFlow<br />
{<br />
__get { return BufferOverFlow; }<br />
__set { BufferOverFlow = value; }<br />
}
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Hi,
I`ve done an ASP.NET AJAX website and it works perfectly on my development machine. Ok! But when I try to deploy my application on a webfarm scenario my website doesn`t work properly.
It comes out with the following error message sometimes:
"
Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.
Details: Error parsing near '
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when i set AutoEventWireup="false" page load doesn,t fire when i set
AutoEventWireup="true" page load fire twice, and seconbd time value of
page.ispostback=false.
can any one help me
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I am working on a Web Application and my code language is VB.Net. i want to upload image and store its path to data base after uploading. I am using following code for uploading file.
Private Function UpLoadImage(ByVal objHtmlInputFile As HtmlInputFile, ByVal FolderName As String) As String
Dim strFilePath As String = FolderName
Dim strFileName As String = ""
Dim strFileNamePath As String = objHtmlInputFile.PostedFile.FileName
If strFileNamePath.Length > 0 Then
Dim strArr() As String = strFileNamePath.Split("\\")
Dim i As Integer = strArr.Length - 1
Do While i = strArr.Length - 1
If strArr(i).IndexOf(".") > -1 Then
strFileName = strArr(i)
End If
i -= 1
Loop
If Not (objHtmlInputFile.PostedFile Is Nothing) Then
Try
objHtmlInputFile.PostedFile.SaveAs(strFilePath + "\" + strFileName)
Response.Write("Uploaded Successfully")
Catch ex As Exception
Response.Write("<br" +="" objhtmlinputfile.value="" "<="" b="">
" + ex.Message)
End Try
End If
Return strFileName
End If
End Function
I am calling this function in this line
Dim FileName As String = Me.UpLoadImage(bookimage, "book_images")
this code generates an exception when it comes to Try Catch.]
Plz help me out.
M. Azeem
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Please mention what exception you are getting !!! I guess putting your code without error/exception message doesnot help much !!!
Thanks,
Arindam D Tewary
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Sorry i forgot to mention the exception before. Following exception is generated
Could not find a part of the path "C:\WINNT\system32\book_images\filename
where as "book_images" folder is created in my peojects root directory.
M. Azeem
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What is the Exception/Message?
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Hi!
I have two gridview that are displaying sql queryes there is two collums and i'm comparing theys two girdview's and i need to display the differences between gridview's on third gridview this gridview has two collums calld 'name' 'amount'. So how i can add rows onthe third girdview on code.
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I would make a DataTable with two columns (name and amount) and put my differences in this table. Then simply set the third gridview's datasource to this new table.
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Thanks for the answer, but i have been trying that and not getting it working. here is my code where i'm doing wrong??
DataTable datatable = new DataTable();
DataColumn column;
// Create new DataColumn, set DataType, ColumnName
// and add to DataTable.
column = new DataColumn();
column.DataType = System.Type.GetType("System.String");
column.ColumnName = "Nimike";
datatable.Columns.Add(column);
// Create second column.
column = new DataColumn();
column.DataType = Type.GetType("System.String");
column.ColumnName = "kpl";
datatable.Columns.Add(column);
DataRow dr = datatable.NewRow();
dr["Nimike"] = "Scott";
dr["kpl"] = "25";
datatable.Rows.Add(dr);
dr = datatable.NewRow();
dr["Nimike"] = "Scott";
dr["kpl"] = "25";
datatable.Rows.Add(dr);
dr = datatable.NewRow();
dr["Nimike"] = "Scott";
dr["kpl"] = "25";
datatable.Rows.Add(dr);
dr = datatable.NewRow();
dr["Nimike"] = "Scott";
dr["kpl"] = "25";
datatable.Rows.Add(dr);
gvErot12.DataSource = datatable;
gvErot12.DataBind();
I know that the answer is simple but I cant get it working the gridview is empty but in gvErot12->Rows->Count is 4 but in the gridview is empty.
The code above is only example for the code that I'm using.
Thx
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I dont in C# but in VB u need to declare the Datatable as shared.It might be static in C#.
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Like the guy who posted before me, I also code in VB. So I'm not sure if this is a problem at all, but in VB you can't declare a column, add it to a table, and then use it to create another column and add it to the table. You have to create two instances of a column and add them separately. The same thing goes with the datarow object.
Where are you putting this code? Is it in the PageLoad event?
I would suggest putting a break point in and actually looking at the datatable to make sure it looks the way you want it to. This will narrow it down to find out if the problem is with setting up the datatable or with actually binding the data to the grid.
Sorry I couldn't be of more help.
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Thanks for your help I find the resolution for the problem. I needet to this
gvErot12 = generateBoundField(datatable, gvErot12);
private GridView generateBoundField(DataTable dt,GridView gv)
{
//Iterate through the columns of the datatable to set the data bound field dynamically.
foreach (DataColumn col in dt.Columns)
{
//Declare the bound field and allocate memory for the bound field.
BoundField bfield = new BoundField();
//Initalize the DataField value.
bfield.DataField = col.ColumnName;
//Initialize the HeaderText field value.
bfield.HeaderText = col.ColumnName;
//Add the newly created bound field to the GridView.
gv.Columns.Add(bfield);
}
return gv;
}
this returns the gridview back to the main program and there
gvErot12.DataSource = datatable;
gvErot12.DataBind();
thanks for quideance!!!!!!!
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hi all,
How can we load an Image from SQl database into Imagebox. I tried but didn't get the solution. any body can send solution ,with code if possible.
Imagebox is not having property IMAGE.
Thanking you.
Rajeshwar Reddy
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hi i am currently reading a book "asp.net2 for dummys" inside that book they mention of how to create a sql express database within asp.net2 however i was just wondering if i could create a sql database NOT on the asp.net2 but on SQL Server Management Studio Express and import the database over is it possible pls tell me thx
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Right click Databases then New Databases
or
run a query using create database
Grady Booch: I told Google to their face...what you need is some serious adult supervision. (2007 Turing lecture)
http:\\www.frankkerrigan.com
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hi this is wat the books says:
It uses the supplied SQL membership provider to manage the user database.
If you want to extend the application so that it tracks additional
data besides the user name, password, and the secret question and
answer, or if you want to use your own database to store the member
information, you can code your own provider. For most applications,
however, the supplied provider should be adequate.
however i would like to connect it to my own sql membership provider anyone know what i should change?
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i want to disaply edit button in last column in grid
how can i do that
i am binding grid at run time
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