如何只画一次油漆？
我在事件Paint处遇到问题。
我的表格非常滞后，因为for + Paint中的Paint循环总是重绘并在事件Paint中循环我的for循环。
它是否只能画一次油漆事件并且不再重绘了？
这张图片：
这是我的代码
Rectangle r1;
Rectangle r2;
Rectangle r3;
int w2 = 0;
private void dataGridView1_Paint(object sender, PaintEventArgs e)
{
///
/// Menggambar Header Column menjadi terlihat seperti di merge cells
///
base.AutoScroll = true;
int h = 0;
for (int j = 0; j < myKaryawan.CountKaryawan() * 2; )
{
newImage = imglists[h];
Rectangle recBackground = this.dataGridView1.GetCellDisplayRectangle(j, -1, true);
Rectangle recImage = this.dataGridView1.GetCellDisplayRectangle(j, -1, true);
Rectangle recString = this.dataGridView1.GetCellDisplayRectangle(j, -1, true);
w2 = this.dataGridView1.GetCellDisplayRectangle(j + 1, -1, true).Width;
recBackground.X += 1;
recBackground.Y += 1;
recImage.X += 1;
recImage.Y += 1;
recString.X += (recString.Width + w2) / 2;
recString.Y += 1;
recBackground.Width = recBackground.Width + w2 - 2;
recBackground.Height = (recBackground.Height / 2 - 2) + recBackground.Height / 4;
recImage.Width = (recImage.Width + w2) / 2 - 2;
recImage.Height = (recImage.Height / 2 - 2) + recImage.Height / 4;
recString.Width = (recString.Width + w2) / 2 - 2;
recString.Height = (recString.Height / 2 - 2) + recString.Height / 4;
e.Graphics.FillRectangle(new SolidBrush(this.dataGridView1.ColumnHeadersDefaultCellStyle.BackColor), recBackground);
StringFormat format = new StringFormat();
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
e.Graphics.DrawString(monthes[j / 2],
this.dataGridView1.ColumnHeadersDefaultCellStyle.Font,
new SolidBrush(this.dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor),
recString,
format);
e.Graphics.DrawImage(imglists[j], recImage);
h++;
j += 2;
}
///
/// Initializing variable yang akan digunakan untuk menggambar
/// Flag untuk menandakan posisi koordinat untuk looping gambar
///
string stat = "";
string awal = dataGridView1.Rows[0].HeaderCell.Value.ToString().Substring(6).ToString();
string akhir = dataGridView1.Rows[6].HeaderCell.Value.ToString().Substring(6).ToString();
tglAwal = Convert.ToDateTime(awal);
tglAkhir = Convert.ToDateTime(akhir);
awal = tglAwal.ToString("yyyy-MM-dd");
akhir = tglAkhir.ToString("yyyy-MM-dd");
var split = new String[25];
int countRows = 0;
int countColumns = 0;
int countRows2 = myActivity.getActivityPagi2(awal, akhir).Tables[0].Rows.Count;
int countColumns2 = myActivity.getActivityPagi2(awal, akhir).Tables[0].Columns.Count;
int countRows3 = 0;
Font font1 = new Font("Arial", 10, FontStyle.Bold, GraphicsUnit.Point);
Font font2 = new Font("Arial", 8, FontStyle.Regular, GraphicsUnit.Point);
int[,] flag = new int[dataGridView1.Rows.Count, dataGridView1.Columns.Count];
int[,] flag2 = new int[dataGridView1.Rows.Count, dataGridView1.Columns.Count];
int[,] flag3 = new int[dataGridView1.Rows.Count, dataGridView1.Columns.Count];
int dgRows = dataGridView1.Rows.Count;
int dgColumns = dataGridView1.Columns.Count;
///
/// Draw Background Colour dan Draw String
/// Pertama Looping semua isi data set kedalam string array
/// Kemudian Looping per Cell untuk menggambar Stringnya dan Fill Rectangle
///
string[,] activity = new string[myActivity.getActivityPagi(awal, akhir).Tables[0].Rows.Count, 6];
string[,] activity2 = new string[myActivity.getActivityPagi2(awal, akhir).Tables[0].Rows.Count, 6];
for (int i = 0; i < countRows2; i++)
{
for (int j = 0; j < countColumns2; j++)
{
activity2[i, j] = myActivity.getActivityPagi2(awal, akhir).Tables[0].Rows[i][j].ToString();
}
}
for (int i = 0; i < dgRows; i++)
{
headerValue = dataGridView1.Rows[i].HeaderCell.Value.ToString();
for (int j = 0; j < dgColumns; j++)
{
// Set sessi
split = headerValue.Split(',');
time = DateTime.Parse(split[1]);
substring1 = dataGridView1.Columns[j].Name.Substring(dataGridView1.Columns[j].Name.Length - 4, 4);
substring2 = dataGridView1.Columns[j].Name.Substring(dataGridView1.Columns[j].Name.Length - 5, 5);
if (substring1 == "Pagi")
{
ses = "Pagi";
}
else
if (substring2 == "Siang")
{
ses = "Siang";
}
// set count row and column for loop
countRows = myActivity.getActivityBySessi(awal, akhir, ses, time.ToString("yyyy-MM-dd")).Tables[0].Rows.Count;
countColumns = myActivity.getActivityBySessi(awal, akhir, ses, time.ToString("yyyy-MM-dd")).Tables[0].Columns.Count;
// set data from dataset to variable array 2 d
///
/// Looping di bawah membuat lag karena melakukan query pada class activity(myActivity) setiap melakukan loop
/// dan berada di 4 Nested loop
/// -----------------------------------------------------------------------------------------------------------------------
///
for (int s = 0; s < countRows; s++)
{
for (int d = 0; d < countColumns; d++)
{
activity[s, d] = myActivity.getActivityBySessi(awal, akhir, ses, time.ToString("yyyy-MM-dd")).Tables[0].Rows[s][d].ToString();
}
r1 = this.dataGridView1.GetCellDisplayRectangle(j, i, true);
r2 = this.dataGridView1.GetCellDisplayRectangle(j, i, true);
r3 = this.dataGridView1.GetCellDisplayRectangle(j, i, true);
w2 = this.dataGridView1.GetCellDisplayRectangle(j, i, true).Width;
r1.X += 1;
r1.Y += flag[i, j] + 1;
r1.Width = 65;
r1.Height = 15;
r2.X += 1;
r2.Y += flag2[i, j] + 15;
r2.Width = 65;
r2.Height = 15;
r3.X += 1;
r3.Y += flag3[i, j] + 30;
r3.Width = 70;
r3.Height = 46;
if (r1.Y == 1 && r1.X == 1)
break;
flag[i, j] = flag[i, j] + 76;
flag2[i, j] = flag2[i, j] + 76;
flag3[i, j] = flag3[i, j] + 76;
if (flag3[i, j] == dataGridView1.Rows[i].MinimumHeight)
{
dataGridView1.Rows[i].MinimumHeight += 76;
}
StringFormat format = new StringFormat();
StringFormat format2 = new StringFormat();
format2.Alignment = StringAlignment.Near;
format2.LineAlignment = StringAlignment.Near;
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
if (time == Convert.ToDateTime(activity[s, 5]) && dataGridView1.Columns[j].Name == activity[s, 3] + activity[s, 4])
{
if (coloring.getColor(activity[s, 1]) == Color.Black)
{
e.Graphics.FillRectangle(new SolidBrush(Color.White), r1);
e.Graphics.DrawString(activity[s, 0],
font1,
new SolidBrush(this.dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor),
r1,
format2);
e.Graphics.FillRectangle(new SolidBrush(coloring.getColor(activity[s, 1])), r2);
e.Graphics.DrawString(activity[s, 1],
font1,
new SolidBrush(Color.White),
r2,
format);
e.Graphics.DrawString(activity[s, 2],
font2,
new SolidBrush(this.dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor),
r3,
format2);
}
else
if (myProblem.getIdProblem(myActivity.getIdDetActivity(activity[s, 3], activity[s, 4], Convert.ToDateTime(activity[s, 5]).ToString("yyyy-MM-dd"), activity[s, 0], activity[s, 1]).Tables[0].Rows[0][0].ToString(), activity[s, 0], activity[s, 1]).Tables[0].Rows.Count >= 1)
{
e.Graphics.FillRectangle(new SolidBrush(Color.White), r1);
e.Graphics.DrawString(activity[s, 0],
font1,
new SolidBrush(Color.Red),
r1,
format2);
e.Graphics.FillRectangle(new SolidBrush(coloring.getColor(activity[s, 1])), r2);
e.Graphics.DrawString(activity[s, 1],
font1,
new SolidBrush(this.dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor),
r2,
format);
e.Graphics.DrawString(activity[s, 2],
font2,
new SolidBrush(this.dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor),
r3,
format2);
}
else
{
//label1.Text = myActivity.getIdActivity(activity[k, 3], activity[k, 4], Convert.ToDateTime(activity[k, 5]), activity[k, 0]).Tables[0].Rows[0][1].ToString();
e.Graphics.FillRectangle(new SolidBrush(Color.White), r1);
e.Graphics.DrawString(activity[s, 0],
font1,
new SolidBrush(this.dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor),
r1,
format2);
e.Graphics.FillRectangle(new SolidBrush(coloring.getColor(activity[s, 1])), r2);
e.Graphics.DrawString(activity[s, 1],
font1,
new SolidBrush(this.dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor),
r2,
format);
e.Graphics.DrawString(activity[s, 2],
font2,
new SolidBrush(this.dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor),
r3,
format2);
}//end else
}//end if time
}
///
///-----------------------------------------------------------------------------------------------------------------------
///
//base.Invalidate();
//base.InvokePaint(dataGridView1, e);
//base.Refresh();
//base.Validate();
// Create paint fill rectangle and draw string
//for (int k = 0; k < countRows; k++)
//{
//}// end for loop
//headerValue = dataGridView1.Rows[i].HeaderCell.Value.ToString();
//split = headerValue.Split(',');
//time = DateTime.Parse(split[1]);
countRows3 = myActivity.getCountMstActivity(time.ToString("yyyy-MM-dd"), ses);
for (int z = 0; z < countRows3; z++)
{
if (myActivity.getIdActivity(time.ToString("yyyy-MM-dd"), ses).Tables[0].Rows.Count > 0)
{
stat = myActivity.getIdActivity(time.ToString("yyyy-MM-dd"), ses).Tables[0].Rows[z][1].ToString();
}
if (stat == "IZIN" || stat == "SAKIT" || stat == "CUTI")
{
for (int l = 0; l < countRows2; l++)
{
if (time == Convert.ToDateTime(activity2[l, 2]) && dataGridView1.Columns[j].Name == activity2[l, 0] + activity2[l, 1])
{
r1 = this.dataGridView1.GetCellDisplayRectangle(j, i, true);
r2 = this.dataGridView1.GetCellDisplayRectangle(j, i, true);
r3 = this.dataGridView1.GetCellDisplayRectangle(j, i, true);
int w2 = this.dataGridView1.GetCellDisplayRectangle(j, i, true).Width;
r1.X += 1;
r1.Y += flag[i, j] + 1;
r1.Width = 65;
r1.Height = 15;
r2.X += 1;
r2.Y += flag2[i, j] + 15;
r2.Width = 65;
r2.Height = 15;
r3.X += 1;
r3.Y += flag3[i, j] + 30;
r3.Width = 70;
r3.Height = 46;
if (r1.Y == 1 && r1.X == 1)
break;
flag[i, j] = flag[i, j] + 76;
flag2[i, j] = flag2[i, j] + 76;
flag3[i, j] = flag3[i, j] + 76;
if (flag3[i, j] == dataGridView1.Rows[i].MinimumHeight)
{
dataGridView1.Rows[i].MinimumHeight += 76;
}
StringFormat format = new StringFormat();
StringFormat format2 = new StringFormat();
format2.Alignment = StringAlignment.Near;
format2.LineAlignment = StringAlignment.Near;
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
e.Graphics.DrawString(stat,
font1,
new SolidBrush(this.dataGridView1.ColumnHeadersDefaultCellStyle.ForeColor),
r1,
format2);
}
}
}//End if izin sakit cuti
if (stat == "HADIR")
{
}//end if HADIR
}// end for loop Z=0
//this.dataGridView1.InvalidateColumn(j);
}//end loop column
}// end for loop row
//DrawingControl.ResumeDrawing(dataGridView1);
}
1 个答案:
答案 0 :(得分：1)
您可以创建一个只创建和绘制一次的内存位图。如果它已经存在，只需绘制位图而不是执行所有绘图。
像这样的伪代码：
Bitmap offscreen = null;
private void dataGridView1_Paint(object sender, PaintEventArgs e)
{
if (offscreen == null)
{
offscreen = new Bitmap(...);
using (Graphics g = Graphics.FromImage(offscreen))
{
// Do all the drawing onto the bitmap. Please make
// sure to offset all coordinates accordingly, so that
// they are relative to (0,0)!!
}
}
e.Graphics.DrawImage(offscreen);
}
如果要绘制每个单元格，它也可能是处理CellPainting事件并单独绘制每个单元格的解决方案。
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