-----------------------------------------------------------
New Message on BDOTNET
-----------------------------------------------------------
From: venkat_kl
Message 4 in Discussion
Hi, Since the above reply is not readable Hi,
If you are working on winforms then,
Setting The Value Displayed By the Windows Forms ProgressBar Control
The .NET Framework gives you several different ways to display a given value
within the ProgressBar control. Which approach you choose will depend on the
task at hand or the problem you are solving: Set the value of the ProgressBar
control directly. This approach is useful for tasks where you know the total of
the item measured that will be involved, such as reading records from a data
source. Additionally, if you only need to set the value once or twice, this is
an easy way to do it. Finally, use this process if you need to decrease the
value displayed by the progress bar.
Increase the ProgressBar display by a fixed value. This approach is useful when
you are displaying a simple count between the minimum and maximum, such as
elapsed time or the number of files that have been processed out of a known
total.
Increase the ProgressBar display by a value that varies. This approach is
useful when you need to change the displayed value a number of times in
different amounts. An example would be showing the amount of hard-disk space
being consumed while writing a series of files to the disk. Setting the
ProgressBar Value Directly
The most direct way to set the value displayed by a progress bar is by setting
the Value property. This can be done either at design time or at run time
To set the ProgressBar value directly
Set the ProgressBar control's Minimum and Maximum values.
In code, set the control's Value property to an integer value between the
minimum and maximum values you have established.
Note If you set the Value property outside the boundaries established by the
Minimum and Maximum properties, the control throws an ArgumentException
exception.
The following example illustrates how to set the ProgressBar value directly.
The code reads records from a data source and updates the progress bar and
label every time a data record is read. This example assumes your form has a
Label control, a ProgressBar control, and a data table with a row called
CustomerRow with FirstName and Last Name fields.
' Visual Basic
Public Sub CreateNewRecords()
' Sets the progress bar's Maximum property to
' the total number of records to be created.
ProgressBar1.Maximum = 20
' Creates a new record in the dataset.
' NOTE: The code below will not compile, it merely
' illustrates how the progress bar would be used.
Dim anyRow As CustomerRow = DatasetName.ExistingTable.NewRow
anyRow.FirstName = "Stephen"
anyRow.LastName = "James"
ExistingTable.Rows.Add(anyRow)
' Increases the value displayed by the progress bar.
ProgressBar1.Value += 1
' Updates the label to show that a record was read.
Label1.Text = "Records Read = " & ProgressBar1.Value.ToString()
End Sub
// C#
public void createNewRecords()
{
// Sets the progress bar's Maximum property to
// the total number of records to be created.
progressBar1.Maximum = 20;
// Creates a new record in the dataset.
// NOTE: The code below will not compile, it merely
// illustrates how the progress bar would be used.
CustomerRow anyRow = DatasetName.ExistingTable.NewRow();
anyRow.FirstName = "Stephen";
anyRow.LastName = "James";
ExistingTable.Rows.Add(anyRow);
// Increases the value displayed by the progress bar.
progressBar1.Value += 1;
// Updates the label to show that a record was read.
label1.Text = "Records Read = " + progressBar1.Value.ToString();
}
Increasing the ProgressBar Value By a Fixed Interval
If you are displaying progress that proceeds by a fixed interval, you can set
the value and then call a method that increases the ProgressBar control's value
by that interval. This is useful for timers and other scenarios where you are
not measuring progress as a percentage of the whole.
To increase the progress bar by a fixed value
Set the ProgressBar control's Minimum and Maximum values.
Set the control's Step property to an integer representing the amount to
increase the progress bar's displayed value.
Call the PerformStep method to change the value displayed by the amount set in
the Step property.
The following example illustrates how a progress bar can maintain a count of
the files in a copy operation.
In the example below, as each file is read into memory, the progress bar and
label are updated to reflect the total files read. This example assumes your
form has a Label control and a ProgressBar control.
' Visual Basic
Public Sub LoadFiles()
' Sets the progress bar's minimum value to a number representing
' no operations complete -- in this case, no files read.
ProgressBar1.Minimum = 0
' Sets the progress bar's maximum value to a number representing
' all operations complete -- in this case, all five files read.
ProgressBar1.Maximum = 5
' Sets the Step property to amount to increase with each iteration.
' In this case, it will increase by one with every file read.
ProgressBar1.Step = 1
' Dimensions a counter variable.
Dim i As Integer
' Uses a For...Next loop to iterate through the operations to be
' completed. In this case, five files are to be copied into memory,
' so the loop will execute 5 times.
For i = 0 To 4
' Insert code to copy a file
ProgressBar1.PerformStep()
' Update the label to show that a file was read.
Label1.Text = "# of Files Read = " & ProgressBar1.Value.ToString
Next i
End Sub
// C#
public void loadFiles()
{
// Sets the progress bar's minimum value to a number representing
// no operations complete -- in this case, no files read.
progressBar1.Minimum = 0;
// Sets the progress bar's maximum value to a number representing
// all operations complete -- in this case, all five files read.
progressBar1.Maximum = 5;
// Sets the Step property to amount to increase with each iteration.
// In this case, it will increase by one with every file read.
progressBar1.Step = 1;
// Uses a for loop to iterate through the operations to be
// completed. In this case, five files are to be copied into memory,
// so the loop will execute 5 times.
for (int i = 0; i <= 4; i++)
{
// Inserts code to copy a file
progressBar1.PerformStep();
// Updates the label to show that a file was read.
label1.Text = "# of Files Read = " + progressBar1.Value.ToString();
}
}
Increasing the ProgressBar Value By a Variable Amount Finally, you can increase
the value displayed by a progress bar such that each increase is a unique
amount. This is useful when you are keeping track of a series of unique
operations, such as writing files of different sizes to a hard disk, or
measuring progress as a percentage of the whole. To increase the progress bar
by a dynamic value Set the ProgressBar control's Minimum and Maximum values.
Call the Increment method to change the value displayed by an integer you
specify.
The following example illustrates how a progress bar can calculate how much
disk space has been used during a copy operation. For more information on
determining the current disk space available, see Code: Finding the Amount of
Disk Space Available (Visual Basic). In the example below, as each file is
written to the hard disk, the progress bar and label are updated to reflect the
amount of hard-disk space available. This example assumes your form has a Label
control and a ProgressBar control.
' Visual Basic
Public Sub ReadFiles()
' Sets the progress bar's minimum value to a number
' representing the hard disk space before the files are read in.
' You will most likely have to set this using a system call.
' NOTE: The code below is meant to be an example and
' will not compile.
ProgressBar1.Minimum = AvailableDiskSpace()
' Sets the progress bar's maximum value to a number
' representing the total hard disk space.
' You will most likely have to set this using a system call.
' NOTE: The code below is meant to be an example
' and will not compile.
ProgressBar1.Maximum = TotalDiskSpace() ' Dimension a counter variable.
Dim i As Integer
' Uses a For...Next loop to iterate through the operations to be
' completed. In this case, five files are to be written to the disk,
' so it will execute the loop 5 times.
For i = 1 To 5
' Insert code to read a file into memory and update file size.
' Increases the progress bar's value based on the size of
' the file currently being written.
ProgressBar1.Increment(FileSize)
' Updates the label to show available drive space.
Label1.Text = "Current Disk Space Used = " &_
ProgressBar1.Value.ToString()
Next i
End Sub // C#
public void readFiles()
{
// Sets the progress bar's minimum value to a number
// representing the hard disk space before the files are read in.
// You will most likely have to set this using a system call.
// NOTE: The code below is meant to be an example and
// will not compile.
progressBar1.Minimum = AvailableDiskSpace();
// Sets the progress bar's maximum value to a number
// representing the total hard disk space.
// You will most likely have to set this using a system call.
// NOTE: The code below is meant to be an example
// and will not compile.
progressBar1.Maximum = TotalDiskSpace(); // Uses a for loop to iterate
through the operations to be
// completed. In this case, five files are to be written
// to the disk, so it will execute the loop 5 times.
for (int i = 1; i<= 5; i++)
{
// Insert code to read a file into memory and update file size.
// Increases the progress bar's value based on the size of
// the file currently being written.
progressBar1.Increment(FileSize);
// Updates the label to show available drive space.
label1.Text = "Current Disk Space Used = " +
progressBar1.Value.ToString();
}
}
bye venkat_kl
-----------------------------------------------------------
To stop getting this e-mail, or change how often it arrives, go to your E-mail
Settings.
http://groups.msn.com/BDotNet/_emailsettings.msnw
Need help? If you've forgotten your password, please go to Passport Member
Services.
http://groups.msn.com/_passportredir.msnw?ppmprop=help
For other questions or feedback, go to our Contact Us page.
http://groups.msn.com/contact
If you do not want to receive future e-mail from this MSN group, or if you
received this message by mistake, please click the "Remove" link below. On the
pre-addressed e-mail message that opens, simply click "Send". Your e-mail
address will be deleted from this group's mailing list.
mailto:[EMAIL PROTECTED]
