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Actually, what you want to do can be done quite easily if you know the trick. As you have found out by now, you can't actually have a singleton DLL because it runs in the process space of the calling application and is isolated from other instances of itself. So, to achieve this you would host this DLL in a remotable object which uses the WellKnown type of Singleton.
This[^] article should help you.
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Thank you, pete. I will study and try it.
lk
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I have a checked listview on my windows form. When the form loads I have code where a specific item in the listview is selected:
listView1.Items[1].Selected = true;
But I also have a selected index changed event. In this event I go through all listview items and set their checked property to false and then check the item that has just been selected:
foreach (ListViewItem lvi in listView1.Items)
{ lvi.Checked = false; }
listView1.SelectedItems[0].Checked = true;
These two pieces of code do not work together. If I comment one section of code, then no errors occur and vis versa but when both pieces of code are not commented out I get the following error at run time:
An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll
How do I solve my problem as both pieces of code are needed.
Lucy
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How about only assigning the SelectedIndexChanged event after making the initial item selected.
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So the SelectIndexChanged event would fire when the user selects an item? How would I do that?
Lucy
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Lucy_H85 wrote: checked listview
Haven't heard of it. Is it a ListView with CheckBoxes or CheckedListBox?
I will use Google before asking dumb questions
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It is a listview with checkboxes.
Lucy
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Well....I will just give you an idea. The StackOverflow exception is because in the CheckChanged event you change the checked property of the listview items, thus this generating another checkchanged event, and so you enter in a infinite loop, which at a certain moment fills the system's stack and the program stops. To avoid this situation you should check if the checkedchanged event has been triggered by the user or by your code. I situation almost like these I used to use a boolean value which is set to true if I change the checked property of an item, or false if the user checks the item, and in the event handler method do whatever you need depending on the value. It's just an idea to work around this problem...maybe you'll find another one.
Hope it helps.
I will use Google before asking dumb questions
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Thank you for your help. Yes I noticed that both of these events were fired many times whilst debugging. I now understand a bit more about stacks. I will try and use boolean values to solve my problem.
Lucy
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I manage to play video in panel in c#. Now i want to play another video automically when the panel is idle(like screensaver). How can i determine that the panel is idle?and then i want to play another video. Please help me with this problem
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You might want to play the other video when the previously running video is no longer running. I'm sure there must be something that determines if the stream is at an end.
What are you using? WMP?
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook
"There is no wealth like knowledge, no poverty like ignorance." Ali ibn Abi Talib
"Animadvertistine, ubicumque stes, fumum recta in faciem ferri?"
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No i am not using windows media player. It is directly running on panel.Do u know anything that determine video is stop.
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Post some code. Particularly the code that you have that declares your player and the code that you use to play the clip.
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook
"There is no wealth like knowledge, no poverty like ignorance." Ali ibn Abi Talib
"Animadvertistine, ubicumque stes, fumum recta in faciem ferri?"
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Hi. I have a DataTable with a column with Value 0. I want to search the Column and replace the 0 with a 1. Can anybody help me with this? Below is what I have so far.
private void tlstrbtnExpUpd_Click(object sender, EventArgs e)
{
DataTable dt = m_dtCallCentre;
foreach (DataRow dr in dt.Rows)
{
if (dr["Exported"].ToString() == "0")
{
}
}
}
Much appreciated.
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private void tlstrbtnExpUpd_Click(object sender, EventArgs e)
{
DataTable dt = m_dtCallCentre;
foreach (DataRow dr in dt.Rows)
{
if (dr["Exported"].ToString() == "0")
{
dr["Exported"] = "1";
}
}
dt.AcceptChanges();
}
Hope it helps.
I will use Google before asking dumb questions
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Hi Mate. I tried this and it doesn't work.
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After you modified the contents of the DataRow you should also call dr.AcceptChanges(). I tried it just now and it works fine.
I will use Google before asking dumb questions
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Sorry about this mate. But should it look like this?
private void tlstrbtnExpUpd_Click(object sender, EventArgs e)
{
DataTable dt = m_dtCallCentre;
int iColCount = dt.Columns.Count;
foreach (DataRow dr in dt.Rows)
{
for (int i = 0; i < iColCount; i++)
{
if (dr["Exported"].ToString() == "0")
{
dr["Exported"] = "1";
}
}
dr.AcceptChanges();
dt.AcceptChanges();
}
}
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How many rows do you have? It may be inefficient to iterate through the rows one at a time.
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Hi. I currently have approx 69 rows. It seems to be reading each row but it is not doing the update. Any other idea?
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private void tlstrbtnExpUpd_Click(object sender, EventArgs e)<br />
{<br />
DataTable dt = m_dtCallCentre;<br />
foreach (DataRow dr in dt.Rows.Select("Exported=0"))<br />
{<br />
dr["Exported"] = "1"; <br />
}<br />
dt.AcceptChanges();<br />
}
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HI mate. System.Data.DataRowCollection does not contain a definition for 'Select'.
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My bad - typo. It's dt.select, not dt.rows.select.
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Thnks mate but for some reason this doesn't work either. I'm at a complete loss now.
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Is there a way to prevent a DataGridView with TextBox fields from skipping to next row after pressing Enter after editing value in Cell? In cell Edit mode it automatically goes to next row after pressing Enter. I've tried overriding OnKeyDown, OnCellEndEdit, OnCellLeave, EditingControlShowing and adding handler to TextBox control, but there seems to be an event occuring after all those events and I can't find where to catch the event where DataGridView finished editing cell and skips to next row. Any Ideas?
Tnx in advance
Dragan Matic
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