如何在winforms图片框中每次单击鼠标时绘制小字符(x或z)

Question

我有一个C# WindowsForms程序，用户在其中单击PictureBox控件。 我希望每次用户单击时都有一个红色小字符。 我也不希望以前的任何角色消失。

Answer 1

yeeeeea

public static Graphics g;
public static Bitmap bmp;
DataTable dt = new DataTable();
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
if (dt.Columns.Count == 0)
{
dt.Columns.Add("xPoint", typeof(float));
dt.Columns.Add("yPoint", typeof(float));
dt.Columns.Add("character", typeof(string));
}
else
{
if (lblX.ForeColor == Color.Red)
{
dt.Rows.Add(e.Location.X - 5, e.Location.Y - 10, "x");
}
else if (lblZ.ForeColor == Color.Red)
{
dt.Rows.Add(e.Location.X - 5, e.Location.Y - 10, "z");
}
if (lblX.ForeColor == Color.Red || lblZ.ForeColor == Color.Red)
{
bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height);
g = Graphics.FromImage(bmp);
DataRow lastRow = dt.Rows[dt.Rows.Count - 1];
g.SmoothingMode = SmoothingMode.AntiAlias;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
foreach (DataRow row in dt.Rows)
{
g.DrawString(row[2].ToString(), new Font("Tahoma", 12), Brushes.Red, float.Parse(row[0].ToString()), float.Parse(row[1].ToString()));
}
g.Flush();
pictureBox1.Image = bmp;
}
}
}