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New Message on BDOTNET
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From: LovedJohnySmith
Message 4 in Discussion
Suresh, You can use DataGridView.CurrentRow.Index, let me give you small
scenario, where we can use this... We have a column that has integer data in
it, We want to display it as a progress bar in the column so the user can
quickly identify lagging processes.
We would also like to change the color of the progress bar based on the cells
value.
For this situation, have a look at the following code snippets using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.ComponentModel;
namespace Sample
{
public class DataGridViewProgressColumn : DataGridViewImageColumn
{
public DataGridViewProgressColumn()
{
CellTemplate = new DataGridViewProgressCell();
}
}
}
namespace Sample
{
class DataGridViewProgressCell : DataGridViewImageCell
{
// Used to make custom cell consistent with a DataGridViewImageCell
static Image emptyImage;
static DataGridViewProgressCell()
{
emptyImage = new Bitmap(1, 1,
System.Drawing.Imaging.PixelFormat.Format32bppArgb);
}
public DataGridViewProgressCell()
{
this.ValueType = typeof(int);
}
// Method required to make the Progress Cell consistent with the
default Image Cell.
// The default Image Cell assumes an Image as a value, although the
value of the Progress Cell is an int.
protected override object GetFormattedValue(object value,
int rowIndex, ref DataGridViewCellStyle cellStyle,
TypeConverter valueTypeConverter,
TypeConverter formattedValueTypeConverter,
DataGridViewDataErrorContexts context)
{
return emptyImage;
}
protected override void Paint(System.Drawing.Graphics g,
System.Drawing.Rectangle clipBounds, System.Drawing.Rectangle cellBounds, int
rowIndex, DataGridViewElementStates cellState, object value, object
formattedValue, string errorText, DataGridViewCellStyle cellStyle,
DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts
paintParts)
{
int progressVal = (int)value;
float percentage = ((float)progressVal / 100.0f); // Need to
convert to float before division; otherwise C# returns int which is 0 for
anything but 100%.
Brush backColorBrush = new SolidBrush(cellStyle.BackColor);
Brush foreColorBrush = new SolidBrush(cellStyle.ForeColor);
// Draws the cell grid
base.Paint(g, clipBounds, cellBounds,
rowIndex, cellState, value, formattedValue, errorText,
cellStyle, advancedBorderStyle, (paintParts &
~DataGridViewPaintParts.ContentForeground));
if (percentage > 0.0)
{
// Draw the progress bar and the text
g.FillRectangle(new SolidBrush(Color.FromArgb(163, 189, 242)),
cellBounds.X + 2, cellBounds.Y + 2, Convert.ToInt32((percentage *
cellBounds.Width - 4)), cellBounds.Height - 4);
g.DrawString(progressVal.ToString() + "%", cellStyle.Font,
foreColorBrush, cellBounds.X + 6, cellBounds.Y + 2);
}
else
{
// draw the text
if (this.DataGridView.CurrentRow.Index == rowIndex)
g.DrawString(progressVal.ToString() + "%", cellStyle.Font,
new SolidBrush(cellStyle.SelectionForeColor), cellBounds.X + 6, cellBounds.Y +
2);
else
g.DrawString(progressVal.ToString() + "%", cellStyle.Font,
foreColorBrush, cellBounds.X + 6, cellBounds.Y + 2);
}
}
}
}
Thanks, Smith http://spaces.msn.com/johnysmith
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