Change label text at runtime in wpf C#
I have one label named as lblMsg.
I want to change it's content runtime dynamically.
Below is the example of my code not the actual code. My for loop contains so many code and it takes approx 8 to 9 seconds on each loop. So it should be visible on UI.
For ex.
for(int i=0;i<=length;i++)
{
lblMsg.Content="Test"+i;
}
But it is not working. Can any one help me with it?
c# wpf label wpf-controls
asked Nov 23 '18 at 6:47
RipalRipal
94
|
show 2 more comments
I have one label named as lblMsg.
I want to change it's content runtime dynamically.
Below is the example of my code not the actual code. My for loop contains so many code and it takes approx 8 to 9 seconds on each loop. So it should be visible on UI.
For ex.
for(int i=0;i<=length;i++)
{
lblMsg.Content="Test"+i;
}
But it is not working. Can any one help me with it?
c# wpf label wpf-controls
asked Nov 23 '18 at 6:47
RipalRipal
94
1
For loop works instantly. if you want to see it updating by the time start with adding a timer and put i++ on the timer tick
– Halil İbrahim
Nov 23 '18 at 6:50
It probably does update, but it goes way too fast for you to notice (probably less then one milisecond).
– Freek W.
Nov 23 '18 at 6:51
Instantly? One millisecond? For all we knowlength = int.MaxValue. UIs are going to hate that and if Telerik is involved well...better get out War and Peace
– MickyD
Nov 23 '18 at 6:53
@MickyD Like I said twice, probably. Not definitely.
– Freek W.
Nov 23 '18 at 7:03
1
The above code is just an exmaple. My actual code takes time to execute .. approax 8-9 secinds on each. And my label should change accordingly like. Task 1 completed on first loop, task 2 completed on second loop etc.
– Ripal
Nov 23 '18 at 9:13
|
show 2 more comments
I have one label named as lblMsg.
I want to change it's content runtime dynamically.
Below is the example of my code not the actual code. My for loop contains so many code and it takes approx 8 to 9 seconds on each loop. So it should be visible on UI.
For ex.
for(int i=0;i<=length;i++)
{
lblMsg.Content="Test"+i;
}
But it is not working. Can any one help me with it?
c# wpf label wpf-controls
asked Nov 23 '18 at 6:47
RipalRipal
94
I have one label named as lblMsg.
I want to change it's content runtime dynamically.
Below is the example of my code not the actual code. My for loop contains so many code and it takes approx 8 to 9 seconds on each loop. So it should be visible on UI.
For ex.
for(int i=0;i<=length;i++)
{
lblMsg.Content="Test"+i;
}
But it is not working. Can any one help me with it?
c# wpf label wpf-controls
c# wpf label wpf-controls
asked Nov 23 '18 at 6:47
RipalRipal
94
asked Nov 23 '18 at 6:47
RipalRipal
94
edited Nov 23 '18 at 9:11
Ripal
asked Nov 23 '18 at 6:47
RipalRipal
94
asked Nov 23 '18 at 6:47
RipalRipal
94
asked Nov 23 '18 at 6:47
RipalRipal
94
94
1
For loop works instantly. if you want to see it updating by the time start with adding a timer and put i++ on the timer tick
– Halil İbrahim
Nov 23 '18 at 6:50
It probably does update, but it goes way too fast for you to notice (probably less then one milisecond).
– Freek W.
Nov 23 '18 at 6:51
Instantly? One millisecond? For all we knowlength = int.MaxValue. UIs are going to hate that and if Telerik is involved well...better get out War and Peace
– MickyD
Nov 23 '18 at 6:53
@MickyD Like I said twice, probably. Not definitely.
– Freek W.
Nov 23 '18 at 7:03
1
The above code is just an exmaple. My actual code takes time to execute .. approax 8-9 secinds on each. And my label should change accordingly like. Task 1 completed on first loop, task 2 completed on second loop etc.
– Ripal
Nov 23 '18 at 9:13
|
show 2 more comments
1
For loop works instantly. if you want to see it updating by the time start with adding a timer and put i++ on the timer tick
– Halil İbrahim
Nov 23 '18 at 6:50
It probably does update, but it goes way too fast for you to notice (probably less then one milisecond).
– Freek W.
Nov 23 '18 at 6:51
Instantly? One millisecond? For all we knowlength = int.MaxValue. UIs are going to hate that and if Telerik is involved well...better get out War and Peace
– MickyD
Nov 23 '18 at 6:53
@MickyD Like I said twice, probably. Not definitely.
– Freek W.
Nov 23 '18 at 7:03
1
The above code is just an exmaple. My actual code takes time to execute .. approax 8-9 secinds on each. And my label should change accordingly like. Task 1 completed on first loop, task 2 completed on second loop etc.
– Ripal
Nov 23 '18 at 9:13
1
1
For loop works instantly. if you want to see it updating by the time start with adding a timer and put i++ on the timer tick
– Halil İbrahim
Nov 23 '18 at 6:50
For loop works instantly. if you want to see it updating by the time start with adding a timer and put i++ on the timer tick
– Halil İbrahim
Nov 23 '18 at 6:50
It probably does update, but it goes way too fast for you to notice (probably less then one milisecond).
– Freek W.
Nov 23 '18 at 6:51
It probably does update, but it goes way too fast for you to notice (probably less then one milisecond).
– Freek W.
Nov 23 '18 at 6:51
Instantly? One millisecond? For all we know
length = int.MaxValue. UIs are going to hate that and if Telerik is involved well...better get out War and Peace– MickyD
Nov 23 '18 at 6:53
Instantly? One millisecond? For all we know
length = int.MaxValue. UIs are going to hate that and if Telerik is involved well...better get out War and Peace– MickyD
Nov 23 '18 at 6:53
@MickyD Like I said twice, probably. Not definitely.
– Freek W.
Nov 23 '18 at 7:03
@MickyD Like I said twice, probably. Not definitely.
– Freek W.
Nov 23 '18 at 7:03
1
1
The above code is just an exmaple. My actual code takes time to execute .. approax 8-9 secinds on each. And my label should change accordingly like. Task 1 completed on first loop, task 2 completed on second loop etc.
– Ripal
Nov 23 '18 at 9:13
The above code is just an exmaple. My actual code takes time to execute .. approax 8-9 secinds on each. And my label should change accordingly like. Task 1 completed on first loop, task 2 completed on second loop etc.
– Ripal
Nov 23 '18 at 9:13
|
show 2 more comments
1 Answer
1
active
oldest
votes
If you just want to display a label with a incrementing number you can create a Task and then use a delay (Thread.Sleep()) to give the UI time to refresh the label.
Because you cannot change UI Elements within a separate Thread, you have to update the UI with the UI Dispatcher.
Sample Code
var length = 1000;
Task.Run(() =>
{
for (int i = 0; i <= length; i++)
{
Application.Current.Dispatcher.BeginInvoke(new Action(() => {
lblMsg.Content = "Test" + i;
}), DispatcherPriority.Render);
Thread.Sleep(100);
}
});
answered Nov 23 '18 at 7:18
richejrichej
578215
Inter-thread marshalling over the message pump is costly. Why not just use a timer?
– MickyD
Nov 23 '18 at 8:11
So without dispatcher I can't update the label on runtime?
– Ripal
Nov 23 '18 at 9:14
@Ripal you can, but you have to give the UI some time to refresh. As MickyD mentioned you can do this with a timer.
– richej
Nov 23 '18 at 11:00
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If you just want to display a label with a incrementing number you can create a Task and then use a delay (Thread.Sleep()) to give the UI time to refresh the label.
Because you cannot change UI Elements within a separate Thread, you have to update the UI with the UI Dispatcher.
Sample Code
var length = 1000;
Task.Run(() =>
{
for (int i = 0; i <= length; i++)
{
Application.Current.Dispatcher.BeginInvoke(new Action(() => {
lblMsg.Content = "Test" + i;
}), DispatcherPriority.Render);
Thread.Sleep(100);
}
});
answered Nov 23 '18 at 7:18
richejrichej
578215
Inter-thread marshalling over the message pump is costly. Why not just use a timer?
– MickyD
Nov 23 '18 at 8:11
So without dispatcher I can't update the label on runtime?
– Ripal
Nov 23 '18 at 9:14
@Ripal you can, but you have to give the UI some time to refresh. As MickyD mentioned you can do this with a timer.
– richej
Nov 23 '18 at 11:00
add a comment |
If you just want to display a label with a incrementing number you can create a Task and then use a delay (Thread.Sleep()) to give the UI time to refresh the label.
Because you cannot change UI Elements within a separate Thread, you have to update the UI with the UI Dispatcher.
Sample Code
var length = 1000;
Task.Run(() =>
{
for (int i = 0; i <= length; i++)
{
Application.Current.Dispatcher.BeginInvoke(new Action(() => {
lblMsg.Content = "Test" + i;
}), DispatcherPriority.Render);
Thread.Sleep(100);
}
});
answered Nov 23 '18 at 7:18
richejrichej
578215
Inter-thread marshalling over the message pump is costly. Why not just use a timer?
– MickyD
Nov 23 '18 at 8:11
So without dispatcher I can't update the label on runtime?
– Ripal
Nov 23 '18 at 9:14
@Ripal you can, but you have to give the UI some time to refresh. As MickyD mentioned you can do this with a timer.
– richej
Nov 23 '18 at 11:00
add a comment |
If you just want to display a label with a incrementing number you can create a Task and then use a delay (Thread.Sleep()) to give the UI time to refresh the label.
Because you cannot change UI Elements within a separate Thread, you have to update the UI with the UI Dispatcher.
Sample Code
var length = 1000;
Task.Run(() =>
{
for (int i = 0; i <= length; i++)
{
Application.Current.Dispatcher.BeginInvoke(new Action(() => {
lblMsg.Content = "Test" + i;
}), DispatcherPriority.Render);
Thread.Sleep(100);
}
});
answered Nov 23 '18 at 7:18
richejrichej
578215
If you just want to display a label with a incrementing number you can create a Task and then use a delay (Thread.Sleep()) to give the UI time to refresh the label.
Because you cannot change UI Elements within a separate Thread, you have to update the UI with the UI Dispatcher.
Sample Code
var length = 1000;
Task.Run(() =>
{
for (int i = 0; i <= length; i++)
{
Application.Current.Dispatcher.BeginInvoke(new Action(() => {
lblMsg.Content = "Test" + i;
}), DispatcherPriority.Render);
Thread.Sleep(100);
}
});
answered Nov 23 '18 at 7:18
richejrichej
578215
answered Nov 23 '18 at 7:18
richejrichej
578215
answered Nov 23 '18 at 7:18
richejrichej
578215
answered Nov 23 '18 at 7:18
richejrichej
578215
578215
Inter-thread marshalling over the message pump is costly. Why not just use a timer?
– MickyD
Nov 23 '18 at 8:11
So without dispatcher I can't update the label on runtime?
– Ripal
Nov 23 '18 at 9:14
@Ripal you can, but you have to give the UI some time to refresh. As MickyD mentioned you can do this with a timer.
– richej
Nov 23 '18 at 11:00
add a comment |
Inter-thread marshalling over the message pump is costly. Why not just use a timer?
– MickyD
Nov 23 '18 at 8:11
So without dispatcher I can't update the label on runtime?
– Ripal
Nov 23 '18 at 9:14
@Ripal you can, but you have to give the UI some time to refresh. As MickyD mentioned you can do this with a timer.
– richej
Nov 23 '18 at 11:00
Inter-thread marshalling over the message pump is costly. Why not just use a timer?
– MickyD
Nov 23 '18 at 8:11
Inter-thread marshalling over the message pump is costly. Why not just use a timer?
– MickyD
Nov 23 '18 at 8:11
So without dispatcher I can't update the label on runtime?
– Ripal
Nov 23 '18 at 9:14
So without dispatcher I can't update the label on runtime?
– Ripal
Nov 23 '18 at 9:14
@Ripal you can, but you have to give the UI some time to refresh. As MickyD mentioned you can do this with a timer.
– richej
Nov 23 '18 at 11:00
@Ripal you can, but you have to give the UI some time to refresh. As MickyD mentioned you can do this with a timer.
– richej
Nov 23 '18 at 11:00
add a comment |
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1
For loop works instantly. if you want to see it updating by the time start with adding a timer and put i++ on the timer tick
– Halil İbrahim
Nov 23 '18 at 6:50
It probably does update, but it goes way too fast for you to notice (probably less then one milisecond).
– Freek W.
Nov 23 '18 at 6:51
Instantly? One millisecond? For all we know
length = int.MaxValue. UIs are going to hate that and if Telerik is involved well...better get out War and Peace– MickyD
Nov 23 '18 at 6:53
@MickyD Like I said twice, probably. Not definitely.
– Freek W.
Nov 23 '18 at 7:03
1
The above code is just an exmaple. My actual code takes time to execute .. approax 8-9 secinds on each. And my label should change accordingly like. Task 1 completed on first loop, task 2 completed on second loop etc.
– Ripal
Nov 23 '18 at 9:13