/// <summary>
/// 将IP地址转换为长整型数字
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public static long ToIpAddrValue(string obj)
{
long result = -1;
string[] arrnum = obj.Split('.');
if (arrnum.Length != 4)
{
return(result);
}
int[] ints = { 0, 0, 0, 0 };
for (int i = 0; i < 4; i++)
{
ints[i] = ConvertObject.ToInt32(arrnum[i], -1);
if (ints[i] < 0 && ints[i] > 255)
{
return(result);
}
}
result = (long)ints[0] * 256 * 256 * 256 + (long)ints[1] * 256 * 256 + (long)ints[2] * 256 + (long)ints[3];
return(result);
}
/// <summary>
/// 获取季度的第一天
/// </summary>
/// <param name="month">2018Q1</param>
/// <returns></returns>
public static DateTime GetQuarterFirstday(string quarter)
{
if (quarter == "")
{
quarter = GetYearQuarterString();
}
int yearIndex = ConvertObject.ToInt32(quarter.Substring(0, 4));
int quarterIndex = ConvertObject.ToInt32(quarter.Substring(5, 1));
switch (quarterIndex)
{
case 4:
return(new DateTime(yearIndex, 10, 1));
case 3:
return(new DateTime(yearIndex, 7, 1));
case 2:
return(new DateTime(yearIndex, 4, 1));
default:
return(new DateTime(yearIndex, 1, 1));
}
}
/// <summary>
/// 获取月份的第一天
/// </summary>
/// <param name="month">yyyyMM</param>
/// <returns></returns>
public static DateTime GetMonthFirstday(string month)
{
try
{
if (month.Length == 6)
{
int yearIndex = ConvertObject.ToInt32(month.Substring(0, 4));
int monthIndex = ConvertObject.ToInt32(month.Substring(4, 2));
return(new DateTime(yearIndex, monthIndex, 1));
}
else
{
throw new Exception();
}
}
catch
{
return(GetMonthFirstday());
}
}
/// <summary>
/// 获取后一个月
/// </summary>
/// <param name="month">当前月</param>
/// <param name="nexts">后面的月数（1为后一个月，2为后两个月，-1为前一个月）</param>
/// <returns></returns>
public static string GetNextMonth(string month, int nexts)
{
try
{
if (month.Length == 6)
{
int yearIndex = ConvertObject.ToInt32(month.Substring(0, 4));
int monthIndex = ConvertObject.ToInt32(month.Substring(4, 2));
return(GetMonthString(new DateTime(yearIndex, monthIndex, 1).AddMonths(nexts)));
}
else
{
throw new Exception();
}
}
catch
{
DateTime today = DateTime.Now;
return(GetMonthString(new DateTime(today.Year, today.Month, 1)));
}
}
/// <summary>
/// 获取当前季度的月份
/// </summary>
/// <param name="yearQuarter"></param>
/// <returns></returns>
public static string[] GetQuarterMonths(string yearQuarter)
{
int yearIndex = ConvertObject.ToInt32(yearQuarter.Substring(0, 4));
int quarterIndex = ConvertObject.ToInt32(yearQuarter.Substring(5, 1));
switch (quarterIndex)
{
case 1:
return(new String[] {
yearIndex + "01",
yearIndex + "02",
yearIndex + "03"
});
case 2:
return(new String[] {
yearIndex + "04",
yearIndex + "05",
yearIndex + "06"
});
case 3:
return(new String[] {
yearIndex + "07",
yearIndex + "08",
yearIndex + "09"
});
case 4:
return(new String[] {
yearIndex + "10",
yearIndex + "11",
yearIndex + "12"
});
}
return(new String[] { });
}
public static int GetDictionaryIntValue(Dictionary <string, object> json, string key, int defaultValue)
{
return(ConvertObject.ToInt32(GetDictionaryStringValue(json, key), defaultValue));
}
/// <summary>
/// 转换图片格式
/// </summary>
/// <param name="originalStream">源图片流</param>
/// <param name="formatWidth">格式化宽度</param>
/// <param name="formatHeight">格式化高度</param>
/// <param name="cut">是否裁剪，true:裁剪、false:不裁剪</param>
/// <param name="newFormat">图片输出格式</param>
/// <returns>新图片流</returns>
public static Stream FormatPicture(Stream originalStream, int formatWidth, int formatHeight, bool cut, PictureFormat newFormat)
{
System.Drawing.Image originalImage = System.Drawing.Image.FromStream(originalStream);
if (formatWidth > 0 && formatHeight == 0)
{
formatHeight = ConvertObject.ToInt32(Math.Round(formatWidth * (float)originalImage.Height / originalImage.Width));
}
if (formatHeight > 0 && formatWidth == 0)
{
formatWidth = ConvertObject.ToInt32(Math.Round(formatHeight * (float)originalImage.Width / originalImage.Height));
}
int towidth = formatWidth;
int toheight = formatHeight;
int x = 0;
int y = 0;
int ow = originalImage.Width;
int oh = originalImage.Height;
if (cut)
{
//指定高宽裁减（不变形）
if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
{
oh = originalImage.Height;
ow = originalImage.Height * towidth / toheight;
y = 0;
x = (originalImage.Width - ow) / 2;
}
else
{
ow = originalImage.Width;
oh = originalImage.Width * formatHeight / towidth;
x = 0;
y = (originalImage.Height - oh) / 2;
}
}
else
{
//默认指定高度宽度，失真缩放
//指定宽度缩放
if (formatHeight <= 0)
{
formatWidth = originalImage.Width * formatHeight / originalImage.Height;
}
//指定高度缩放
else if (formatWidth <= 0)
{
formatHeight = originalImage.Height * formatWidth / originalImage.Width;
}
}
//新建一个bmp图片
System.Drawing.Image image = new System.Drawing.Bitmap(formatWidth, formatHeight);
//新建一个画板
System.Drawing.Graphics graphics = System.Drawing.Graphics.FromImage(image);
//设置高质量插值法
graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//清空画布并以透明背景色填充
graphics.Clear(System.Drawing.Color.Transparent);
//在指定位置并且按指定大小绘制原图片的指定部分
graphics.DrawImage(
originalImage,
new System.Drawing.Rectangle(0, 0, formatWidth, formatHeight),
new System.Drawing.Rectangle(x, y, ow, oh),
System.Drawing.GraphicsUnit.Pixel
);
originalImage.Dispose();
System.Drawing.Imaging.ImageFormat imageFormat = GetImageFormat(newFormat);
MemoryStream newStream = new MemoryStream();
try
{
//以指定格式保存图片
string outputFile = Path.GetTempPath() + Guid.NewGuid().ToString();// +".jpg";
image.Save(outputFile, imageFormat);
FileStream fs = File.Open(outputFile, FileMode.Open);
newStream = new MemoryStream(ConvertStream.ToBuffer(fs));
fs.Close();
File.Delete(outputFile);
}
catch (Exception ex)
{
throw ex;
}
finally
{
originalImage.Dispose();
}
return(newStream);
}
/// <summary>
/// 格式化图片
/// </summary>
/// <param name="fileBinary">源图片二进制</param>
/// <param name="formatWidth">格式化宽度</param>
/// <param name="formatHeight">格式化高度</param>
/// <param name="cut">是否裁剪，true:裁剪、false:不裁剪</param>
/// <param name="picFormat">图片输出格式</param>
/// <returns>新图片二进制</returns>
public static Byte[] FormatPicture(Byte[] fileBinary, int formatWidth, int formatHeight, bool cut, PictureFormat picFormat)
{
System.Drawing.Image originalImage = System.Drawing.Image.FromStream(new MemoryStream(fileBinary));
if (formatWidth > 0 && formatHeight == 0)
{
formatHeight = ConvertObject.ToInt32(Math.Round(formatWidth * (float)originalImage.Height / originalImage.Width));
}
if (formatHeight > 0 && formatWidth == 0)
{
formatWidth = ConvertObject.ToInt32(Math.Round(formatHeight * (float)originalImage.Width / originalImage.Height));
}
int towidth = formatWidth;
int toheight = formatHeight;
int x = 0;
int y = 0;
int ow = originalImage.Width;
int oh = originalImage.Height;
if (cut)
{
//指定高宽裁减（不变形）
if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
{
oh = originalImage.Height;
ow = originalImage.Height * towidth / toheight;
y = 0;
x = (originalImage.Width - ow) / 2;
}
else
{
ow = originalImage.Width;
oh = originalImage.Width * formatHeight / towidth;
x = 0;
y = (originalImage.Height - oh) / 2;
}
}
else
{
//默认指定高度宽度，失真缩放
//指定宽度缩放
if (formatHeight <= 0)
{
formatWidth = originalImage.Width * formatHeight / originalImage.Height;
}
//指定高度缩放
else if (formatWidth <= 0)
{
formatHeight = originalImage.Height * formatWidth / originalImage.Width;
}
}
//新建一个bmp图片
System.Drawing.Image image = new System.Drawing.Bitmap(formatWidth, formatHeight);
//新建一个画板
System.Drawing.Graphics graphics = System.Drawing.Graphics.FromImage(image);
//设置高质量插值法
graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//清空画布并以透明背景色填充
graphics.Clear(System.Drawing.Color.Transparent);
//在指定位置并且按指定大小绘制原图片的指定部分
graphics.DrawImage(
originalImage,
new System.Drawing.Rectangle(0, 0, formatWidth, formatHeight),
new System.Drawing.Rectangle(x, y, ow, oh),
System.Drawing.GraphicsUnit.Pixel
);
originalImage.Dispose();
System.Drawing.Imaging.ImageFormat imageFormat = GetImageFormat(picFormat);
//以指定格式保存图片
try
{
MemoryStream stream = new MemoryStream();
image.Save(stream, imageFormat);
return(stream.GetBuffer());
}
catch (Exception ex)
{
throw ex;
}
finally
{
//originalImage.Dispose();
image.Dispose();
graphics.Dispose();
}
}