/// <summary>
/// 获取一个随机颜色条带
/// </summary>
///<param name="colorName">颜色条带名称</param>
/// <param name="num">颜色个数,若num大于最大颜色个数，则返回最大颜色个数的条带</param>
/// <returns>颜色条带</returns>
public ColorRampInfo GetRandomColorRamp(string colorName, int num)
{
ColorRampInfo ramp = null;
int colNum = num;
int max = GetRandomMaxColorNum(colorName);
int min = GetRandomMinColorNum(colorName);
if (num > max)
{
colNum = max;
}
else if (num < min)
{
colNum = min;
}
for (int i = 0; i < _randomColorRamps.Count; i++)
{
if (_randomColorRamps[i].ColorName == colorName && _randomColorRamps[i].Count == colNum)
{
ramp = _randomColorRamps[i];
break;
}
}
return(ramp);
}
public ColorRampInfo GetRampInfo(string colorName, int num)
{
ColorRampInfo cri = new ColorRampInfo();
if (_linearColorRamps.Exists(t => t.ColorName == colorName))
{
cri = GetLinearColorRamp(colorName, num);
}
else if (_randomColorRamps.Exists(t => t.ColorName == colorName))
{
cri = GetRandomColorRamp(colorName, num);
}
return(cri);
}
/// <summary>
/// 构造函数
/// </summary>
public ColorRampPlus()
{
try
{
string cmdStr = "select * from [ColorBrewer$]";
string conStr = "provider=microsoft.jet.oledb.4.0;data source=" + _configPath + ";extended properties='Excel 8.0;HDR=yes;IMEX=1'";
OleDbConnection con = new OleDbConnection(conStr);
OleDbDataAdapter adapter = new OleDbDataAdapter(cmdStr, con);
DataSet dataSet = new DataSet();
adapter.Fill(dataSet);
con.Close();
DataTable table = dataSet.Tables[0];
for (int i = 0; i < table.Rows.Count; i++)
{
string colorName = table.Rows[i]["ColorName"].ToString();
string numOfColor = table.Rows[i]["NumOfColors"].ToString();
string type = table.Rows[i]["Type"].ToString();
if (string.IsNullOrEmpty(colorName) == false && string.IsNullOrEmpty(numOfColor) == false && string.IsNullOrEmpty(type) == false)
{
int num = int.Parse(numOfColor);
if (num > 0)
{
ColorRampInfo info = new ColorRampInfo();
info.ColorName = colorName;
while (num > 0)
{
string R = table.Rows[i]["R"].ToString();
string G = table.Rows[i]["G"].ToString();
string B = table.Rows[i]["B"].ToString();
if (string.IsNullOrEmpty(R) || string.IsNullOrEmpty(G) || string.IsNullOrEmpty(B))
{
break;
}
int r = int.Parse(R);
int g = int.Parse(G);
int b = int.Parse(B);
info.ColorList.Add(Color.FromArgb(r, g, b));
num--;
i++;
}
if (type.ToString() == "seq" || type.ToString() == "div")
{
_linearColorRamps.Add(info);
}
else if (type.ToString() == "qual")
{
_randomColorRamps.Add(info);
}
i--;
}
}
}
table.Dispose();
}
catch (Exception ex)
{
}
}
