/// <summary>
/// 将图片流输出为文件
/// </summary>
/// <param name="tablename"></param>
public static string ExportSoilPicture(string type, string datetime, string cropcode, string nurient)
{
byte[] imagebytes;
string datetimeforamt = datetime.Substring(0, datetime.LastIndexOf(" ")).Replace('/', '-');
string cropName = DataBaseOperate.get_CropCHName(cropcode);
string nutrientName = DataBaseOperate.get_NutrientCHName(nurient);
string pathname = Application.StartupPath + @"\Image\" + type + "_" + datetimeforamt + "_" + cropName + "_" + nutrientName + ".jpg";
string strSql = "select PIC_MAP from MONITOR_PICTURE where INDICATOR_NAME='" + type + "' and MONITORTIME='" + datetime + "' and CROP_CODE='" + cropcode + "' and NUTRIENT_CODE='" + nurient + "'";
SqlConnection con = DataBaseOperate.getSqlCon();
SqlCommand cmd = new SqlCommand(strSql, con);
SqlDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
string value_path = "";
while (reader.Read())
{
//获取图片数据
imagebytes = (byte[])reader["PIC_MAP"];
//将内存流格式化为位图
if (imagebytes.Length > 0)
{
MemoryStream stream = new MemoryStream(imagebytes);
if (File.Exists(pathname))
{
File.Delete(pathname);
}
Image image = Image.FromStream(stream);
image.Save(pathname);
stream.Close();
image.Dispose();
value_path = pathname;
}
else
{
value_path = "";
}
}
con.Close();
return(value_path);
}
/// <summary>
/// 转换表中的值
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public static DataTable Convert_TableValue(DataTable dt)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
if (dt.Columns.Count == 4) //根据输出列数判断是否是Soil
{
if (dt.Columns[0].ColumnName == "作业站") //根据列名判断作物范围
{
dt.Rows[i][0] = DataBaseOperate.getVillName(dt.Rows[i][0].ToString());
}
else if (dt.Columns[0].ColumnName == "作业区")
{
dt.Rows[i][0] = DataBaseOperate.getTownName(dt.Rows[i][0].ToString());
}
dt.Rows[i][1] = ((DateTime)dt.Rows[i][1]).ToShortDateString();
dt.Rows[i][2] = DataBaseOperate.get_CropCHName(dt.Rows[i][2].ToString());
dt.Rows[i][3] = Math.Round((double)dt.Rows[i][3], 3);
}
else //soil
{
if (dt.Columns[0].ColumnName == "作业站")
{
dt.Rows[i][0] = DataBaseOperate.getVillName(dt.Rows[i][0].ToString());
}
else if (dt.Columns[0].ColumnName == "作业区")
{
dt.Rows[i][0] = DataBaseOperate.getTownName(dt.Rows[i][0].ToString());
}
dt.Rows[i][1] = ((DateTime)dt.Rows[i][1]).ToShortDateString();
dt.Rows[i][2] = DataBaseOperate.get_CropCHName(dt.Rows[i][2].ToString());
dt.Rows[i][3] = DataBaseOperate.get_NutrientCHName(dt.Rows[i][3].ToString());
dt.Rows[i][4] = Math.Round((double)dt.Rows[i][4], 4);
}
}
return(dt);
}