我正在尝试通过在foreach中进行控制来制作动态控件(标签,图片框和按钮)。 foreach由datarows控制,datarows是从我调用的SQL函数创建的。
问题是我的图片似乎不像现在这样在我的图片盒上工作。
到目前为止,我已将此作为代码: 全局变量:
private int i = 0, beginningHeight = 70, addingToHeight = 55;
PictureBox picturebox = new PictureBox();
功能:
private void tonenAlleCategorieen()
{
foreach (DataRow dr in blCategorie.getAlleCategorieenMetLimieten())
{
//making labels dyanmic and fill them with the correct text (from database)
string categorie = (string)dr.Field<string>("Omschrijving");
Label label = new Label();
label.BackColor = Color.Transparent;
label.ForeColor = Color.FromArgb(97, 97, 97);
label.Font = new Font("Myriam Pro", 10, FontStyle.Bold);
label.Width = 200;
label.Name = categorie;
label.Text = categorie;
label.BackColor = Color.Transparent;
label.Location = new Point(30, beginningHeight + addingToHeight);
this.Controls.Add(label);
// getting the figures (max figures) from the db to show in a label
double limiet = (double)dr.Field<double>("maximumBedrag");
Label labeltest = new Label();
labeltest.BackColor = Color.Transparent;
labeltest.ForeColor = Color.FromArgb(97, 97, 97);
labeltest.Font = new Font("Myriam Pro", 8, FontStyle.Bold);
labeltest.Width = 200;
labeltest.Name = Convert.ToString(limiet);
labeltest.Text = "Limiet: " + Convert.ToString(limiet) + "€";
labeltest.BackColor = Color.Transparent;
labeltest.Location = new Point(30, (beginningHeight + 27) + addingToHeight);
this.Controls.Add(labeltest);
//making pictureboxes for every single row in the db
PictureBox picturebox = new PictureBox();
picturebox.Width = 400;
picturebox.Name = "picturebox" + i;
picturebox.Height = 15;
picturebox.Location = new Point(30, (beginningHeight + 27) + addingToHeight);
this.Controls.Add(picturebox);
//calling the paint event for drawing inside the pictureboxes
picturebox.Paint += new PaintEventHandler(picturebox_Paint);
//adjusting height (55px extra per new row)
beginningHeight += 55;
i++;
}
}
private void picturebox_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
//draw here
//Graphics g = picturebox.CreateGraphics();
int x = 30;
int y = (beginningHeight + 27) + addingToHeight;
int breedteGebruikt = 200;
int breedteNietGebruikt = picturebox.Width - breedteGebruikt;
int hoogteBalk = picturebox.Height;
g.DrawRectangle(new Pen(Color.Red), new Rectangle(10, 5, 50, 5));
g.FillRectangle(Brushes.Green, x, y, breedteNietGebruikt, hoogteBalk);
g.FillRectangle(Brushes.Red, x, y, breedteGebruikt, hoogteBalk);
picturebox.Refresh();
}
有人可以帮助我,告诉我如何将图形添加到我的图片盒中,以便我可以看到我的图片框应该填充多少百分比? 这是一个很好看的图片示例:
正如你在上面的图片中所看到的,它目前无法正常工作,并且我已将数据放入数据库中,用于名为“Boodschappen”的第一条记录,现在应该由我的图形填充30%。
有人知道解决方案吗? :) 感谢
答案 0 :(得分:2)
现在这个问题只会出现问题:我不允许添加g to this.Controls.Add(g);它给了我错误参数1:不能 从'System.Drawing.Graphics'转换为 “System.Windows.Forms.Control的
很明显,您无法添加Graphics
作为控件。此外,如果您以这种方式绘制,当图片框或表格重新绘制时,您的绘图将消失。所以你应该在图片框的Paint
事件中画画。
double maxLimit = 0; int maxleftpos = 0; private void tonenAlleCategorieen() {
foreach (DataRow dr in blCategorie.getAlleCategorieenMetLimieten())
{
//making labels dyanmic and fill them with the correct text (from database)
string categorie = (string)dr.Field<string>("Omschrijving");
Label label = new Label();
label.BackColor = Color.Transparent;
label.ForeColor = Color.FromArgb(97, 97, 97);
label.Font = new Font("Myriam Pro", 10, FontStyle.Bold);
label.Width = 200;
label.Name = categorie;
label.Text = categorie;
label.BackColor = Color.Transparent;
label.Location = new Point(10, beginningHeight + addingToHeight);
maxleftpos = Math.Max(label.Left + label.Width, maxleftpos);
this.Controls.Add(label);
// getting the figures (max figures) from the db to show in a label
double limiet = (double)dr.Field<double>("maximumBedrag");
maxLimit = Math.Max(limiet, maxLimit);
Label labeltest = new Label();
labeltest.BackColor = Color.Transparent;
labeltest.ForeColor = Color.FromArgb(97, 97, 97);
labeltest.Font = new Font("Myriam Pro", 8, FontStyle.Bold);
labeltest.Width = 200;
labeltest.Name = Convert.ToString(limiet);
labeltest.Text = "Limiet: " + Convert.ToString(limiet) + "€";
labeltest.BackColor = Color.Transparent;
labeltest.Location = new Point(30, (beginningHeight + 27) + addingToHeight);
this.Controls.Add(labeltest);
//making pictureboxes for every single row in the db
PictureBox picturebox = new PictureBox();
picturebox.Width = 200;
picturebox.Name = "picturebox" + i;
picturebox.Height = 15;
picturebox.Tag = limiet;
picturebox.Location = new Point(100, (beginningHeight + 27) + addingToHeight);
this.Controls.Add(picturebox);
picturebox.BringToFront();
//calling the paint event for drawing inside the pictureboxes
picturebox.Paint += new PaintEventHandler(picturebox_Paint);
//adjusting height (55px extra per new row)
beginningHeight += 55;
i++;
}
foreach (Control c in this.Controls)
{
if (c is PictureBox)
{
c.Location = new Point(maxleftpos, c.Top);
}
}
if (this.Width<maxleftpos+150)
{
this.Width = maxleftpos + 50;
}
this.Refresh();
}
private void picturebox_Paint(object sender, PaintEventArgs e)
{
PictureBox p = sender as PictureBox;
Graphics gr = e.Graphics;
gr.ResetTransform();
//Graphics g = picturebox.CreateGraphics();
int breedteGebruikt = Convert.ToInt32((double)p.Tag);
int max = Convert.ToInt32(maxLimit);
int grwidht = breedteGebruikt * p.Width / max;
gr.DrawRectangle(new Pen(Color.Red), new Rectangle(10, 5, 50, 5));
gr.FillRectangle(Brushes.Green, 0, 0, p.Width, p.Height);
gr.FillRectangle(Brushes.Red, 0, 0, grwidht, p.Height);
}