原文:WPF GDI+字符串绘制成图片(二)

版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/BYH371256/article/details/83412533

本章讲述:在WPF中,使用GDI+技术,把字符串数据绘制成图片;文字可分为:居左显示、居中显示、居右显示。

完整的例子参考网址:

1、XAML 前端设计

<Window x:Class="WPF_GDI_Test.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<StackPanel>
<Border Margin="1" BorderThickness="1" BorderBrush="Gray">
<StackPanel Orientation="Horizontal" VerticalAlignment="Top">
<Button Margin="10" Content="左对齐" Height="25" Width="50" Click="Button_Click"/>
<Button Margin="10" Content="居中对齐" Height="25" Width="60" Click="Button_Click_1"/>
<Button Margin="10" Content="右对齐" Height="25" Width="50" Click="Button_Click_2"/>
</StackPanel>
</Border>
<Border Margin="1" BorderThickness="1" BorderBrush="Gray">
<Image x:Name="img" />
</Border>
</StackPanel>
</Window>

2、后台逻辑主要代码

private List<string> SourStrs;
private string path = System.Windows.Forms.Application.StartupPath + "\\11.png";
private int mapwidth = 1920;
private int mapheight = 1080;
private float fontSize;
private string fontFamily; public MainWindow()
{
InitializeComponent(); Drawing();
} private void Drawing()
{
fontFamily = "Microsoft YaHei";
fontSize = 100f;
string str1 = "一个实用的C#字符串操作类,内置了14个字符串处理函数,几乎囊括了所有常用到的字符串处理操作,比如转换字符串,获取指定字符分";
int strlen = str1.Length;
int num = Encoding.Default.GetBytes(str1).Length;
Font font = new Font(fontFamily, fontSize);
this.DrawingTextImage(str1, font, 1920, 1080);
} private void DrawingTextImage(string txt, Font font, int w, int h)
{
int strlen = txt.Length;
int num = Encoding.Default.GetBytes(txt).Length;
Bitmap map = new Bitmap(1920, 1080);
Graphics g = Graphics.FromImage(map);
g.PageUnit = GraphicsUnit.Pixel;
g.SmoothingMode = SmoothingMode.HighQuality;
g.Clear(Color.Black);
g.DrawRectangle(new Pen(Color.Red, 4f), 10, 10, 0x76c, 0x424);
SizeF size1 = this.Get_StrWidth1(g, "字", font);
SizeF size2 = this.Get_StrWidth1(g, "H", font);
int n = (int)(((float)w) / size2.Width);
char[] txtSour = txt.ToArray<char>();
List<string> bkstrs = this.GetStrList(g, font, txt, 1080);
this.SourStrs = bkstrs;
int row = 0;
foreach (string tmp in bkstrs)
{
g.DrawString(tmp, font, Brushes.OrangeRed, (float)0f, (float)(row * size2.Height));
row++;
}
g.Dispose();
map.Save(this.path, System.Drawing.Imaging.ImageFormat.Png);
map.Dispose();
this.BitmpToImageSource(this.path);
} //居左、居中、居右显示
private void DrawStringBitmap(int mode)
{
Bitmap map = new Bitmap(1920, 1080);
Graphics g = Graphics.FromImage(map);
g.PageUnit = GraphicsUnit.Pixel;
g.SmoothingMode = SmoothingMode.HighQuality;
g.Clear(Color.Black);
g.DrawRectangle(new Pen(Color.Red, 4f), 10, 10, 0x76c, 0x424);
Font font = new Font(this.fontFamily, this.fontSize);
float row = 0f;
float tmph = this.Get_StrWidth1(g, "H", font).Height;
foreach (string tmp in this.SourStrs)
{
SizeF size = this.Get_StrWidth1(g, tmp, font);
float x = 0f;
switch (mode)
{
case 0:
x = 0f;
break; case 1:
x = (this.mapwidth - size.Width) / 2f;
break; case 2:
x = this.mapwidth - size.Width;
break;
}
g.DrawString(tmp, font, Brushes.OrangeRed, x, row * size.Height);
row++;
}
g.Dispose();
map.Save(this.path, ImageFormat.Png);
map.Dispose();
this.BitmpToImageSource(this.path);
} private double Get_StrWidth1(Graphics g, char txt, Font font)
{
return (double)g.MeasureString(txt.ToString(), font).Width;
} private double Get_StrWidth2(Graphics g, string txt, Font font)
{
return (double)TextRenderer.MeasureText(g, txt, font, new System.Drawing.Size(0, 0)).Width;
} private SizeF Get_StrWidth1(Graphics g, string txt, Font font)
{
return TextRenderer.MeasureText(g, txt, font, new System.Drawing.Size(0, 0));
} public static System.Windows.Media.FormattedText Get_StrWidth(string txt, double fontSize, string fontFamily)
{
System.Windows.Media.FormattedText formattedText = new System.Windows.Media.FormattedText(
txt,
System.Globalization.CultureInfo.InvariantCulture,
System.Windows.FlowDirection.LeftToRight,
new System.Windows.Media.Typeface(fontFamily.ToString()),
fontSize,
System.Windows.Media.Brushes.Black
); return formattedText;
}

3、输入字符串处理逻辑

private int GetRowIndex(Graphics g, Font font, int ridex, string txt, int n, out string otxt, bool isend)
{
int len = n;
string tmptxt = txt.Substring(ridex, n);
double txtw = 0.0;
double maxw = 1920.0;
double tmp = 0.0;
do
{
tmp = this.Get_StrWidth1(g, tmptxt, font).Width;
txtw = tmp;
if (isend)
{
break;
}
if (txtw < maxw)
{
tmptxt = txt.Substring(ridex, ++len);
}
else
{
len--;
tmptxt = tmptxt.Substring(0, len);
}
}
while (txtw < maxw);
otxt = tmptxt;
return len;
} private List<string> GetStrList(Graphics g, Font font, string txt, int maxh)
{
List<string> bk = new List<string>();
string tmptxt = null;
int idex = 0;
double tmph = 0.0;
double w = 1920.0;
SizeF size2 = this.Get_StrWidth1(g, "H", font);
int n = (int)(w / ((double)size2.Width));
int row = 0;
bool isend = false;
do
{
if ((idex + n) > txt.Length)
{
n = txt.Length - idex;
isend = true;
}
idex += this.GetRowIndex(g, font, idex, txt, n, out tmptxt, isend);
row++;
tmph = row * size2.Height;
if (maxh > tmph)
{
bk.Add(tmptxt);
}
}
while (tmph < maxh);
return bk;
}

4、保存图片

//保存图片
private void BitmpToImageSource(string filepath)
{
System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.Open, System.IO.FileAccess.Read);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
fs.Close();
fs.Dispose(); System.IO.MemoryStream ms = new System.IO.MemoryStream(buffer);
System.Windows.Media.Imaging.BitmapImage bitmapImage = new System.Windows.Media.Imaging.BitmapImage();
bitmapImage.BeginInit();
bitmapImage.StreamSource = ms;
bitmapImage.EndInit(); img.Source = bitmapImage;
}

5、按钮响应事件

private void Button_Click(object sender, RoutedEventArgs e)
{
if (this.SourStrs != null)
{
DrawStringBitmap(0);//参数0:居左;1:居中;2:居右
}
}

6、效果图

WPF GDI+字符串绘制成图片(二)的更多相关文章

  1. WPF GDI+字符串绘制成图片(一)

    原文:WPF GDI+字符串绘制成图片(一) 版权声明:本文为博主原创文章,未经博主允许不得转载. https://blog.csdn.net/BYH371256/article/details/83 ...

  2. C# 在网页中将Base64编码的字符串显示成图片

    在写一个接口,返回的json里面有图片,是Base64编码的字符串. 测试接口的时候,发现原来在html显示,是直接可以将Base64编码的字符串显示成图片的. 格式如下: <img src=d ...

  3. Gson字符串编码,字符串转换成图片保存,二进制转换成图片保存

    import java.io.BufferedInputStream; import java.io.ByteArrayInputStream; import java.io.File; import ...

  4. base64字符串转化成图片

    package com.dhht.wechat.util; import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder; import ja ...

  5. c# 图片转二进制/字符串 二进制/字符串反转成图片

    protected void Button1_Click(object sender, EventArgs e) { //图片转二进制 byte[] imageByte = GetPictureDat ...

  6. C# Base64字符串转换成图片及图片转换为Base64

    最近有朋友经常会问我一些问题,例如,如何把一个字符串转换成base64字符串,如何把一个二进制文件转换成Base64文件,以及如何转换回原有的文件,在此我把方法写一下   字符串与Base64相互转换 ...

  7. python 将base64字符串还原成图片保存

    import os,base64 strs='''/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAoHBwgHBgoICAgLCgoLDhgQDg0NDh0VFhEYIx8lJCI ...

  8. base64转换成图片

    前端代码JS: 前端图片为canvsa绘图转base64格式 function putTextInfo() { var canvasImg = painting.canvas.toDataURL('i ...

  9. java 后台将base64字符串保存为图片

    直接上代码: import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; impo ...

随机推荐

  1. 利用cobbler无人值守批量安装centos

    准备: 至少两台机器,分别用作cobbler的服务端和安装测试端 准备一个iso的安装文件,最好是4G多的那个dvd包,以前用网易源上那个centos 6.4 x86_64 通过xen安装时就报错:N ...

  2. 问题:一球从某高度自由落下,每次落地后反跳回原高度的一半;再落下,求它在第n次落地时,共经过多少米?第n次反弹多高?

    import java.util.Scanner; //题目:一球从100米高度自由落下,每次落地后反跳回原高度的一半:再落下,求它在第10次落地时,共经过多少米?第10次反弹多高? public c ...

  3. lazysizes-好用的延迟加载JS插件

    此插件可直接引入lazysizes即可 <script src="lazysizes.min.js"></script> 延迟加载(lazy load)是( ...

  4. jquery mobile header title左对齐 button右对齐

    <div data-theme="b" data-role="header" data-position="fixed"> &l ...

  5. 解决Bug步骤

    1.看报错.将bug定位到文件.类.方法. 2.打断点.将bug定位到具体代码行号. 3.分析断点输出结果. 4.结合报错和断点结果,修改代码. 总之:拆解问题.定位问题.分析问题.解决问题.

  6. UVALive - 2515 (最小生成树 kruskal)

    You are assigned to design network connections between certain points in a wide area. You are given ...

  7. 关于contentquery webpart的pdf文件如何在OOS上打开,并且所有文件在浏览器新起的页面打开?

    function SetHref(pdf) { var c = pdf.href; var d = "http://eds.jd.com"; var f = "" ...

  8. position+left+bottom+top+right

    今天才知道原来position加上上下左右可以控制的到div的宽度的 比如我现在有一个需要 这样一个需求 现在是红色部分50px 但是你可能不知道剩下的蓝色部分的高度是多少 蓝色部分要怎么填满剩余的高 ...

  9. Oracle索引实现方式

  10. DDL-数据类型

    一.数值型1.整型tinyint.smallint.mediumint.int/integer.bigint1         2        3          4            8 特 ...