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Okay, I've tinkered with this code and have not been able to get an image to display:
http://www.codeguru.com/Csharp/Csharp/cs_controls/datagrid/article.php/c4783/#more[^]
Basically, I am designing a drag and drop where I create a thumbnail for each image dragged and put that image into a table. I want everything in one row so I create a column for each image dragged. Then I create a new GridTableStyle for each new column. Then I set the DataSource. I'd like to do this with the use of a dataset, but I not picky just so long as I can get it to work.
So far all I get is a big white box with a giant Red "X" through it. Anyone have any ideas? Thanks in advance!
Here is my code:
public void ImageLoader()
{
//Create Thumbnails
foreach(string fn in files)
{
try
{
ImageConverter(fn);
}
catch(Exception)
{
}
}
//ids is Image-DataSet
ids.Tables.Add(dt);
getGridTableStyle();
image_Datagrid.TableStyles.Add(DGStyle);
image_Datagrid.DataSource = ids;
image_Datagrid.DataMember = dt.TableName;
}
private void ImageConverter(string filename)
{
string imageFile = Path.GetFileNameWithoutExtension(lastFilename).ToLower();
//Create and Save the Thumbnail and return the image
Image img = CreateThumbnail(filename);
//Put the image in the DataTable and name the column the image name without
//extension or directory info i.e. 'c:\\test.bmp' uses 'test' as the column name
AddThumbnailToDataTable(img, imageFile);
}
private void AddThumbnailToDataTable(Image img2, string columnName)
{
dt.BeginLoadData();
this.dt.Columns.Add(columnName);
this.dt.Rows[0][columnName] = (Bitmap)img2;
dt.EndLoadData();
}
private void getGridTableStyle()
{
try
{
DataGridColumnStyle GridTextColumn, GridBmpColumn;
DGStyle = new DataGridTableStyle();
// select table
DGStyle.MappingName = "Images";
// Use a PropertyDescriptor to create a formatted column. First get the PropertyDescriptorCollection
// for the data source and data member.
PropertyDescriptorCollection pcol = form1.BindingContext[ids, dt.TableName].GetItemProperties();
// create the first column style for a text column
GridTextColumn = new DataGridTextBoxColumn(pcol["ImageInfo"]);
GridTextColumn.MappingName = "ImageInfo";
GridTextColumn.HeaderText = "Image-Name";
GridTextColumn.Width = 50;
DGStyle.GridColumnStyles.Add(GridTextColumn);
//Create an ImageColumn for each image in the table
for(int i = 1; i < dt.Columns.Count; i++)
{
// create column style for an image column
GridBmpColumn = new DataGridImageColumn(pcol[dt.Columns[i].ColumnName]);
GridBmpColumn.MappingName = dt.Columns[i].ColumnName;
GridBmpColumn.HeaderText = "Bitmap";
GridBmpColumn.Width = 80;
DGStyle.GridColumnStyles.Add(GridBmpColumn);
}
DGStyle.RowHeadersVisible = false;
}
catch(Exception e)
{
MessageBox.Show(e.Message, "Adding Images to Grid TableStyle");
}
}
Thanks!
RABB17
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Figured it out. If anyone ever wants to do this:
Don't pass an image to the datatable, instead pass the location of the new file.
Then in the DataGridImageColumn class make the following adjustment:
string ImageFile = (string)GetColumnValueAtRow(Source, RowNum);
Image img = Image.FromFile(ImageFile);
Bitmap ImagePic = (Bitmap)img;
Problem is that when you put the image file in the table, it can only hold a limited number of bytes for it (8kb) and you lose much of the image's data.
Hope this helps someone one day,
RABB17
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Hello,
I use InternetExplorer object to go to an url through IE. But, the page requires user name and password login. The boxes are in a popup dialog (javascript I think).
How can I fill in the user name and password?
Moreover, how can I click the button ('Yes') in the popup dialog?
Thanks for your help!
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You call the url with the user pass embedded.
IOW http://user:pass@www.foo.com
Should work, well it did many years back 
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sorry, the page fails to be displayed if I type: https//user:pw@www.mypage.com
Any suggestion please?
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Archyami wrote: https//user:pw@www.mypage.com
https://user:pw@www.mypage.com
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"The page cannot be displayed"
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Just to make sure:
Did you replace "user" and "pw" in the URL with the actual user name and password?
---
b { font-weight: normal; }
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yes.
https://myname:mypw@mypage
-> "The page cannot be displayed"
https://mypage
-> popup a dialog for username and pw
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There is a "security alert" popup dialog from windows before the popup login.
Is it the cause of failure using
https://myname:mypw@mypage
?
If so, how to avoid the "security alert" popup dialog?
Thanks!
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hi all i have searched the codeproject for password related articles but to no avail..can anyone provide me with any links or articles that do an application that requires the user to input a password and to verify before allowing him to continue with the application??
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Well, it's kind of trivial. The hard part is deciding how to store your password and how secure you want it to be. All you need is a form that takes a username and password and that needs to return success before the rest of the app runs.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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ok thanks do u have a sample application or link where i can get to analyse the source codes? appreciate for yr help
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Not really. Create a form that takes a username and password, and have your code call it. Hook up the OK and Cancel buttons to DialogResult.OK and Cancel. Make the OK button not work unless the username/password is correct. Have your app close if the dialog returns DialogResult.Cancel.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Is there an open source or free Checked ComboBox in .Net, either C# or VB.Net?
I have been searching high & low but to no avail.
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Finally i found a link in codeproject.com after two weeks of searching..
The URL is
http://www.codeproject.com/cs/miscctrl/customcombos.asp
Mmm. The strange think i found the link from
http://www.tech-archive.net/.
Looks like Codeproject search engine should be improved.
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Hi,
I am trying to find out why my program isn't working so I inserted a breakpoint where the error occurs. When I then step thru after checking the variable is populated in the "locals" window everything works fine. I remove the breakpoint and it falls over again.
Background:
There is a combobox populated with dates gathered from a database. The selected combobox.text value is then used to pass into a oledb select command to populate a datagrid. Excerpts are:-
string fDate = this.comboBoxTresReport.Text.ToString();
DateTime fromDate = Convert.ToDateTime(fDate);
When I put a breakpoint at the first line AND I CHECK THE VALUE OF THE VARIABLE CONTAINED AT this.comboBoxTresReport.Text the program steps thru Ok. Remove the breakpoint OR I do not check the variable this.comboBoxTresReport.Text the second line generates an error "String was not recognized as a valid DateTime."
What have I missed doing?
Glen Harvy
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This means you have a race condition. Stopping the program means that everything sorts itself out in the time it takes for the breakpoint. Is the app multithreaded ?
Ah.... that's interesting. Obviously, checking the text has a side effect on the code. What if you add a line like string s = this.comboBoxTresReport.Text , does that solve the problem ? Note, I am not advocating this as a solution, just wondering if the root issue is that when the string is first evaluated, it works for some reason.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Thanks for your prompt response.
Christian Graus wrote: Is the app multithreaded ?
Being new to this I really don't know if it is or isn't. I haven't specifically done anything to make it so or otherwise  .
Christian Graus wrote: What if you add a line like string s = this.comboBoxTresReport.Text
I added that to code just before mine and it didn't make any difference.
Glen Harvy
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Then it's not multithreaded.
OK, then the evaluation in the debugger is what causes the difference. That's pretty strange.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Could it be that the combobox is not filled (what is the right term  ) at the time that I'm getting it's value? Using the debugger would fill it wouldn't it?
If this is the case, how do I make sure the combobox is filled prior to me getting it's value?
Glen Harvy
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Using the debugger shouldn't be putting values in the combobox, but you can check by checking the combo.Items.Count property ( or something like that. ) If there's any chance the combo is empty, your code should have that check anyhow.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
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Glen Harvy wrote: What have I missed doing?
Outside guess: CultureInfo... 
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Glen Harvy
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Glen Harvy wrote: string fDate = this.comboBoxTresReport.Text.ToString();
DateTime fromDate = Convert.ToDateTime(fDate);
Are you executing this code in response to a button click or some UI event?
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