/**
* @brief 从Xml节点中读取数值类型，使用时，必须在函数中指明数值类型
* 如: int id = ExtractNumeric<int>(xmlNode, "Id", -1, true);
*
* @param node xml节点
* @param nodeName 节点名字
* @param defualtVal 默认值
* @param isMust 是否强制不能为空
*
* @return
*/
public static T ExtractNumeric <T>(DBC_Row node, string nodeName, T defualtVal, bool isMust)
{
T result = defualtVal;
if (node == null || !node.HasFields || node.SelectFieldByName(nodeName) == null)
{
return(result);
}
string nodeText = node.SelectFieldByName(nodeName);
if (!CrossEngineHelper.StringIsNullOrEmpty(nodeText))
{
try
{
result = (T)Convert.ChangeType(nodeText, typeof(T));
}
catch (System.Exception ex)
{
string info = string.Format("ExtractNumeric Error node:{0} nodeName:{1} ex:{2} stacktrace:{3}",
node.RowIndex, nodeName, ex.Message, ex.StackTrace);
LogSystem.Debug(info);
CrossEngineHelper.LogCallStack();
}
}
return(result);
}
public static MemoryStream ReadFileAsMemoryStream(string filePath)
{
try
{
byte[] buffer = ReadFileAsArray(filePath);
if (buffer == null)
{
LogSystem.Debug("Err ReadFileAsMemoryStream failed:{0}\n", filePath);
return(null);
}
return(new MemoryStream(buffer));
}
catch (Exception e)
{
LogSystem.Debug("Exception:{0}\n", e.Message);
CrossEngineHelper.LogCallStack();
return(null);
}
}
public static bool Exists(string filePath)
{
try
{
if (handlerFileExists != null)
{
return(handlerFileExists(filePath));
}
else
{
LogSystem.Debug("ReadFileByEngine handler have not register: {0}", filePath);
return(false);
}
}
catch (Exception e)
{
LogSystem.Debug("Exception:{0}\n", e.Message);
CrossEngineHelper.LogCallStack();
return(false);
}
}
public static byte[] ReadFileAsArray(string filePath)
{
byte[] buffer = null;
try
{
if (handlerReadFile != null)
{
buffer = handlerReadFile(filePath);
}
else
{
LogSystem.Debug("ReadFileByEngine handler have not register: {0}", filePath);
}
}
catch (Exception e)
{
LogSystem.Debug("Exception:{0}\n", e.Message);
CrossEngineHelper.LogCallStack();
return(null);
}
return(buffer);
}