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I have this code:
<div class="col-lg-12 control-section toast-default-section">
<SfToast ID="toast_default" #ref="ToastObj" Title="Error" Content="#a" </SfToast>
</div>
#code{
a = "Test";
StringBuilder b = new StringBuilder();
b.Append("Hello ");
if (b.ToString() != "")
{
a = a+ b;
StateHasChanged();
await ToastObj.ShowAsync();
}
}
When this "ToastObj" open, I need click 2 times to refresh. I don't know why.
For example:
First Result: Test
Second Result: Test Hello
I need click two times to refresh.
For the future, it would be helpful to see all the code, including the SFToast component.
However, You are calling it correctly. All you have to do to Get the page to refresh is to have the code hit the "StateHasChanged()" function. I think the problem is that you have code sitting outside of any function. Consider the #code{} to act like a normal class file with a few diffrences. For example there is no "Constructor" but the first method called on creation will be the OnInitalized(). I suggest wrapping the code and making sure all variables are initialized
#code{
protected override void OnInitialized()
{
var a = "Test";
StringBuilder b = new StringBuilder();
b.Append("Hello ");
if (b.ToString() != "")
{
a = a+ b;
StateHasChanged();
await ToastObj.ShowAsync();
}
}
}
Try use InvokeAsync(StateHasChanged);
Related
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I need equivalent for Application.OpenForms[0].InvokeRequired in WinForms for wpf.I tried with
var dispatcher = myDispatcherObject.Dispatcher;
if (dispatcher.CheckAccess()) { /* ... */ }
but no luck
Try the following extension method:
public static void TryToExecuteOnUI(this Action uiAction)
{
var uiDispatcher = System.Windows.Threading.Dispatcher.CurrentDispatcher;
if (uiDispatcher.CheckAccess() == false)
{
uiDispatcher.Invoke(uiAction);
return;
}
uiAction();
}
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I dont know what to do, im new to whole coding and the project im working on is going quite well, tried adding more commands and this problem jumps to the first private part here. If needed i can send the rest of the code
RegisterYNCommand();
{
}
private void RegisterYNCommand();
{
{
Commands.CreateCommand("YN")
.Do(async (e) =>
{
int yesnoIndex = rand.Next(randomTexts.Length);
string memeToPost = yesno[yesnoIndex];
await e.Channel.SendMessage(memeToPost);
});
Remove the first
RegisterNYCommand();
{
}
Looks like duplicated code...
and the ; at the end of
private void RegisterNYCommand(); // This ';'
{
Commands.CreateCommand("YN")
.Do(async (e) =>
{
int yesnoIndex = rand.Next(randomTexts.Length);
string memeToPost = yesno[yesnoIndex];
await e.Channel.SendMessage(memeToPost);
});
}
Just remove ; character after your methods declaration:
private void RegisterYNCommand()
{
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Ho do you get the current instance of a class?
The class have search method and cancel method.
Code example:
if (btnSearch.Text =="Search")
{
Searcher srch = new Searcher();
srch.Search();
btnSearch.Text = "Cancel";
return;
}
if (btnSearch.Text == "Cancel")
{
//call a method in the instance above for example
srch.Cancel();
}
I want to create the instance only when btnSearch.Text =="Search"; and when btnSearch.Text =="Cancel"; i want to call srch.Cancel();
////
Thanks to nmclean, problem solved, makes sense i had to declare the Search class at a higher scope to be able to access the current running instance.
Your srch variable must be declared at a higher scope than the function, otherwise it will not persist to the next time the function is called. Most likely this means it should be a field of the class:
class YourClass
{
private Searcher srch;
void YourMethod()
{
if (btnSearch.Text == "Search")
{
srch = new Searcher();
srch.Search();
btnSearch.Text = "Cancel";
return;
}
if (btnSearch.Text == "Cancel")
{
srch.Cancel();
}
}
}
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am calling the function of a form from another form. It executes but do not really show up. so any suggestions??
My code goes like
In Form FrmA
private void Print()
{
FrmMenu ObjMain = new FrmMenu();
ObjMain.Show();
}
public void CreateButtons(string Action)
{
btn.Text=Action;
}
And When the Form FrmMenu gets open then another function gets executed in constructor of FrmMenu
Public FrmMenu()
{
FrmA f2 = new FrmA();
f2.CreateButtons("NEW");
}
But nothing happens ...!!! The function CreateButtons executes but do not show any changes
The text of button remain the same.
so please help me out.
EDITED
You must pass the instance of FrmA into the constructor of FrmMenu.
In FrmA:
private void Print()
{
FrmMenu ObjMain = new FrmMenu(this);
ObjMain.Show();
}
In FrmMenu:
public FrmMenu(FrmA f2)
{
f2.CreateButtons("NEW");
}
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want to ask about void type, so I could know that it works or no
in PHP i could have a condition like this:
if(mysql_query($query))
{ bla bla }
else
{ print error }
how to do like that on ASP.NET?
i'm trying like this:
if (k.EditPassword(username.Text, oldPassTxt.Text, newPassTxt.Text) == true )
{
Response.Redirect("sample.aspx");
}
else
{ print error }
but of course, it cannot be like that, because void isn't boolean
Usually void functions that do work that can fail will have some other way of informing you that they failed. Often they will throw an Exception:
try
{
k.EditPassword(...)
}
catch(ApplicationException ex)
{
// print Exception
}
Response.Redirect(...)
Other times they will set a status variable or something:
k.EditPassword(...)
if (k.Result == Result.OK)
Response.Redirect(...)
else
// print error...
Looking at documentation or source code for the conditions you are trying to handle is the only way to know how to handle it.
You can use a literal control and add your text to it. So your code will go something like,
if (k.EditPassword(username.Text, oldPassTxt.Text, newPassTxt.Text) == true )
{
Response.Redirect("sample.aspx");
}
else
{ Literal1.Text = error; }
Literal should be in design file, you can add it from toolbox.
But a better and proper way would be to,
Log it. (You would need a log mecahnism)
Write a unit test :)