使用窗口应用程序中的数据表或数据集在gridview中添加进度条 [英] Add progress bar in gridview using datatable or dataset in window application
本文介绍了使用窗口应用程序中的数据表或数据集在gridview中添加进度条的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我需要在类似这样的 WinForms 应用程序中使用 DataTable 或 DataSet 在 DataGridView 添加进度条:
I need to add a progress bar in a DataGridView using DataTable or DataSet in a WinForms application similar to this:
我发现的每个地方都有这样的代码:
Everywhere I've found has code like:
DataGridViewProgressColumn column = new DataGridViewProgressColumn();
column.HeaderText = "Status";
dataGridView1.Columns.Add(column);
并赋值:
object[] row1 = new object[] { "test1", "test2", 50 };
但我需要将此进度条放在 DataTable 或 DataSet 中.
But I need this progress bar to be in a DataTable or DataSet.
推荐答案
这是来自 msdn 的示例,并进行了一些更正.我使用 Datagridview、计时器、按钮.
So this is example from msdn, with some correction. I use Datagridview, Timer, Button.
现在您需要使用线程进行计算.我希望这会有所帮助.
Now you need to use thread for your computing. I hope this will help.
public class DataGridViewProgressColumn : DataGridViewImageColumn
{
public DataGridViewProgressColumn()
{
CellTemplate = new DataGridViewProgressCell();
}
}
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 = 0;
if (value != null)
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);
}
}
}
private void button1_Click(object sender, EventArgs e)
{
DataGridViewProgressColumn column = new DataGridViewProgressColumn();
dataGridView1.Columns.Add(new DataGridViewProgressColumn());
dataGridView1.Rows.Add("Row 1", 10);
dataGridView1.Rows.Add("Row 2", 50);
dataGridView1[1, 0].Value = 10;
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
Random r=new Random();
dataGridView1[1, 0].Value = r.Next(0, 100);
dataGridView1[1, 1].Value = r.Next(0, 100);
}
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