public static List <string> GetCharListByChar(string selectedChar, int totalNum)
{
string rootPath = AppDomain.CurrentDomain.SetupInformation.ApplicationBase;
string textFilePath = Path.Combine(rootPath, TxtPath);
string text = File.ReadAllText(textFilePath);
//MDLUpdateCouch _MDLUC = new MDLUpdateCouch( "weixin_vcchar", 7200 );//7200-720(120分钟)
//CouchBaseClient _Couch = new CouchBaseClient();
//string text = _Couch.GetCouchData<string>( _MDLUC, new CouchBaseClient.GetDataSourceDelegate<string>( GetVcCharStringData ), null );
List <string> chineseChars = new List <string>();
int txtLen = text.Length;
while (true)
{
int temp = VcRandom.GetRandomGuid(0, txtLen);
string t = text[temp].ToString();
if (!chineseChars.Contains(t))
{
chineseChars.Add(t);
}
if (chineseChars.Count == totalNum)
{
break;
}
}
return(chineseChars);
}
/// <summary>
/// 获取文本中的某一个字符
/// 做了一个缓存
/// </summary>
/// <returns></returns>
public static string GetVcChar()
{
//MDLUpdateCouch _MDLUC = new MDLUpdateCouch( "weixin_vcchar", 7200 );//7200-720(120分钟)
//CouchBaseClient _Couch = new CouchBaseClient();
//string text = _Couch.GetCouchData<string>( _MDLUC, new CouchBaseClient.GetDataSourceDelegate<string>( GetVcCharStringData ), null );
string rootPath = AppDomain.CurrentDomain.SetupInformation.ApplicationBase;
string textFilePath = Path.Combine(rootPath, TxtPath);
string text = File.ReadAllText(textFilePath);
var txtLen = text.Length;
var temp = VcRandom.GetRandomGuid(0, txtLen);
var t = text[temp].ToString();
return(t);
}
/// <summary>
/// 传入参数，C# gdi绘图，并且得到文件流，显示在前台
/// </summary>
/// <param name="gdiWidth"></param>
/// <param name="gdiHeight"></param>
/// <param name="isAdvancedVcCode"></param>
/// <param name="selectedChar"></param>
/// <param name="fms"></param>
/// <param name="positionList"></param>
/// <param name="selectedPoint"></param>
public void DrawVc(int gdiWidth, int gdiHeight, bool isAdvancedVcCode, string selectedChar, out MemoryStream fms, out List <Position> positionList, out Position selectedPoint)
{
//先处理图形形式 m*n
int rows = int.Parse(VcCodeLimitType.Split(new[] { '*' }, StringSplitOptions.RemoveEmptyEntries)[0]);
int cols = int.Parse(VcCodeLimitType.Split(new[] { '*' }, StringSplitOptions.RemoveEmptyEntries)[1]);
string rootPath = AppDomain.CurrentDomain.SetupInformation.ApplicationBase;
;
string folderPath = isAdvancedVcCode ? AdvancedBgFolderPath : NormalBgFolderPath;
folderPath = Path.Combine(rootPath, folderPath);
string[] files = Directory.GetFiles(folderPath);
int randBgPic = VcRandom.GetRandomGuid(0, files.Length - 1);
Bitmap image = (Bitmap)Image.FromFile(files[randBgPic]);
image = ResizeImage(image, gdiWidth, gdiHeight, 1);
Graphics g = Graphics.FromImage(image);
g.PageUnit = GraphicsUnit.Pixel;
#region 画横线竖线
//画横线竖线
if (IsShowCoordinateLine)
{
List <Line> lines = new List <Line>();
for (int i = 0; i < rows; i++)
{
Point hStart = new Point(0, gdiHeight * i / rows);
Point hEnd = new Point(gdiWidth, gdiHeight * i / rows);
Line temp = new Line(hStart, hEnd);
lines.Add(temp);
}
for (int j = 0; j < cols; j++)
{
Point vStart = new Point(gdiWidth * j / cols, 0);
Point vEnd = new Point(gdiWidth * j / cols, gdiHeight);
Line temp = new Line(vStart, vEnd);
lines.Add(temp);
}
Color lineColor = VcColor.ConvertHexStringToColor(VcCodeCellLineColor);
foreach (Line t in lines)
{
g.DrawLine(new Pen(lineColor), t.start, t.end);
}
}
#endregion
#region 每个格子的中心点
//每个格子的中心点
List <Point> cellCenterPoints = new List <Point>();
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < cols; j++)
{
double xTemp = (2 * j + 1) * gdiWidth / (2 * cols);
double yTemp = (2 * i + 1) * gdiHeight / (2 * rows);
Point pTemp = new Point((int)xTemp, (int)yTemp);
cellCenterPoints.Add(pTemp);
}
}
#endregion
#region 得到待写入画板的不重复的字符序列，数目等于方格的数目
string textFilePath = Path.Combine(rootPath, TxtPath);
string txt = File.ReadAllText(textFilePath);
List <string> chineseChars = new List <string>();
int txtLen = txt.Length;
while (true)
{
int temp = VcRandom.GetRandomGuid(0, txtLen);
string t = txt[temp].ToString();
if ((!chineseChars.Contains(t)) && (t != selectedChar))
{
chineseChars.Add(t);
}
if (chineseChars.Count == rows * cols)
{
break;
}
}
#endregion
#region 处理空白格百分比问题
string[] spaceRate = VcCodeCharSpaceRate.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries); // 0.2 0.5
double minSpaceRate = double.Parse(spaceRate[0]);
double maxSpaceRate = double.Parse(spaceRate[1]);
int minSpaceNum = (int)Math.Ceiling(rows * cols * minSpaceRate);
int maxSpaceNum = (int)Math.Floor(rows * cols * maxSpaceRate);
int randSpaceNum = VcRandom.GetRandomGuid(minSpaceNum, maxSpaceNum);
List <int> existedIndexList = new List <int>();
for (int i = 0; i < randSpaceNum; i++)
{
int t = 0;
//注意goto
loop:
t = VcRandom.GetRandomGuid(0, chineseChars.Count - 1);
if (!existedIndexList.Contains(t))
{
existedIndexList.Add(t);
}
else
{
goto loop;
}
chineseChars[t] = " ";//中文的空格键
}
#endregion
#region 巧妙处理选定字符的方法：从chineseChars中随机选择一个元素，被selectedChar替换即可
int ranIndex = VcRandom.GetRandomGuid(0, chineseChars.Count - 1);
chineseChars[ranIndex] = selectedChar;
#endregion
#region 干扰线
Random rand = new Random();
//干扰线颜色
List <Color> interferenceColorList = VcColor.GetColorListFromHexString(InterferenceLineColorList);
if (IsInterferenceLineActive)
{
for (int i = 0; i < InterferenceLineNumber; i++)
{
int x1 = rand.Next(image.Width);
int x2 = rand.Next(image.Width);
int y1 = rand.Next(image.Height);
int y2 = rand.Next(image.Height);
int colRan = rand.Next(0, interferenceColorList.Count);
Brush brush = new SolidBrush(interferenceColorList[colRan]);
Pen pen = new Pen(brush, rand.Next(1, 4));
g.DrawLine(pen, x1, x2, y1, y2);
}
}
#endregion
#region 噪点
if (IsImageNoiseActive)
{
Color noiseColor = VcColor.GetColorListFromHexString(ImageNoiseColor).First();
for (int i = 0; i < ImageNoiseNumber; i++)
{
int x = rand.Next(image.Width);
int y = rand.Next(image.Height);
Brush b = new SolidBrush(noiseColor);
g.FillEllipse(b, x, y, ImageNoiseDiameter, ImageNoiseDiameter);
}
}
#endregion
#region 在格子里写字，字体、颜色随机，字号、旋转角度可配置
//定义字体
string[] fontFamily = FontFamilyStr.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < fontFamily.Length; i++)
{
fontFamily[i] = fontFamily[i].Trim();
}
int fontFamilyCount = fontFamily.Length;
//定义字体颜色
List <Color> charColorList = VcColor.GetColorListFromHexString(CharColorList);
string[] rotateAngle = VcCodeCharRotateRange.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
int minRotateAngle = int.Parse(rotateAngle[0]);
int maxRotateAngle = int.Parse(rotateAngle[1]);
for (int i = 0; i < chineseChars.Count; i++)
{
//随机颜色
int randColor = VcRandom.GetRandomGuid(0, charColorList.Count - 1);
Brush b = new SolidBrush(charColorList[randColor]);
//随机字体
string fontFamilyStr = fontFamily[VcRandom.GetRandomGuid(0, fontFamilyCount - 1)];
Font f = new Font(fontFamilyStr, FontSize);
//计算此字体占用长宽像素数
SizeF size = g.MeasureString(chineseChars[i], f); //这个函数非常重要，可以得出此种字体此种字号的字写在这个画板上占用的长宽像素
Point nP = new Point((int)(-size.Width / 2), (int)(-size.Height / 2));
//旋转
g.TranslateTransform(cellCenterPoints[i].X, cellCenterPoints[i].Y);
int flagDegree = VcRandom.GetRandomGuid(minRotateAngle, maxRotateAngle) * (VcRandom.GetRandomTrueOrFalse() ? 1 : -1);
g.RotateTransform(flagDegree);
g.DrawString(chineseChars[i], f, b, nP);
g.RotateTransform((-1) * flagDegree);
g.TranslateTransform(-cellCenterPoints[i].X, -cellCenterPoints[i].Y);
//画出一些便于定位的中心点，便于定位
if (IfCenterRedPointExist)
{
g.DrawRectangle(new Pen(Color.Red), cellCenterPoints[i].X, cellCenterPoints[i].Y, 1, 1);
}
}
#endregion
//输出到浏览器
MemoryStream ms = new MemoryStream();
image.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
g.Dispose();
image.Dispose();
fms = ms;
if (chineseChars.Count == cellCenterPoints.Count)
{
positionList = new List <Position>();
positionList.AddRange(chineseChars.Select((t, i) => new Position()
{
XDis = cellCenterPoints[i].X,
YDis = cellCenterPoints[i].Y,
ChineseChar = t
}));
selectedPoint = new Position
{
XDis = cellCenterPoints[ranIndex].X,
YDis = cellCenterPoints[ranIndex].Y,
ChineseChar = selectedChar
};
}
else
{
positionList = null;
selectedPoint = null;
}
}