Yes, You are rigth, it was happening only when using DrawToBitmap function and only in Windows XP. So setting multiline to true as you said, this solved the problem.
Another solution is to detect if OS is XP (since it only happens in XP).
If so then detect when property editor object has an image and a text below (In the code below, for example, I distinguish if it is PointSize and LineWidth which they have not an image, only text so only text will be drawn on the cell by using TextRenderer.DrawText), and if so you can create an image and draw into it the image and the text below by using DrawToBitmap and then the text by using TextRenderer.DrawText respectively. DrawText is not affected by this issue.
Below the code (This method should be called from paint method).
private void CreateCellImageXP(
PropertyEditor propertyEditor,
Graphics graphics,
Rectangle clipBounds,
Rectangle cellBounds,
int rowIndex,
DataGridViewElementStates cellState,
object value,
object formattedValue,
string errorText,
DataGridViewCellStyle cellStyle,
DataGridViewAdvancedBorderStyle advancedBorderStyle,
DataGridViewPaintParts paintParts)
{
// Create a Bitmap image in memory and set its CompositingMode
Bitmap bmp = new Bitmap(cellBounds.Width, cellBounds.Height,PixelFormat.Format32bppArgb);
Graphics gBmp = Graphics.FromImage(bmp);
gBmp.SmoothingMode = SmoothingMode.AntiAlias;
gBmp.InterpolationMode = InterpolationMode.HighQualityBicubic;
gBmp.PixelOffsetMode = PixelOffsetMode.HighQuality;
Control ctrlValue = propertyEditor.Controls[0];
float height = cellBounds.Height;
int left = 0;
int top = 0;
if (propertyEditor.Source.PropertyName != "PointSize" &&
propertyEditor.Source.PropertyName != "LineWidth")
{
// SET THE IMAGE
ctrlValue.Height = cellBounds.Height - 3;
Rectangle rectValue = ctrlValue.Bounds;
Bitmap imageValue = new Bitmap(rectValue.Width, cellBounds.Height, PixelFormat.Format32bppArgb);
ctrlValue.DrawToBitmap(imageValue, new Rectangle(0, 0, rectValue.Width, cellBounds.Height));
//imageValue.Save("c:\\image.png", ImageFormat.Png);
gBmp.DrawImage(imageValue, new Rectangle(1, 1, rectValue.Width, cellBounds.Height));
height = ctrlValue.Height;
left = ctrlValue.Width + ctrlValue.Left + 5;
top = ctrlValue.Top;
}
// SET THE TEXT following the image
StringFormat stringFormat = new StringFormat();
stringFormat.LineAlignment = StringAlignment.Center; // Vertical Aligment
RectangleF rectf = new RectangleF((float)ctrlValue.Width + ctrlValue.Left + 5, (float)ctrlValue.Top, (float)cellBounds.Width, height);
TextRenderer.DrawText(
gBmp,
propertyEditor.Controls[1].Text,
cellStyle.Font,
new Rectangle(left, top, cellBounds.Width, (int)height),
cellStyle.ForeColor,
cellStyle.BackColor,
TextFormatFlags.VerticalCenter | TextFormatFlags.Left);
gBmp.Flush();
// draw the bitmap on the cell
graphics.DrawImage(bmp, cellBounds.Location);
bmp.Dispose();
gBmp.Dispose();
}
Also, I have been creating a little program (see attachment), better than the one provided in the another thread. In this program I detect the OS in paint method. If XP I create a custom image to show it correctly by calling the method CreateCellImageXP. If not XP, then I call another method CreateCellImageVista7. These methods are called from paint method depending on the OS.
Now, by using your solution, only one method is always called for any OS (XP, Vista or 7), and it is named createCellImage (In the code is initially commented, you can try it by uncomment it and also uncomment the return that appears below) and there I apply what you has commented, textbox multiline to true.
Below I attach the program.
Thanks a lot for helping me.
PD.: I was doing this little program for you to check the issue but I come late... sorry. You was faster than me 😉 It also shows how to display notify error icon in a concrete cell when you entered an invalid value for the cell, check to enter a value greater than 20 in Line Width column, also tooltip implemented when mouse over the icon.
