本文整理汇总了C#中System.Data.OracleClient.OracleConnection.GetScratchBuffer方法的典型用法代码示例。如果您正苦于以下问题：C# OracleConnection.GetScratchBuffer方法的具体用法？C# OracleConnection.GetScratchBuffer怎么用？C# OracleConnection.GetScratchBuffer使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Data.OracleClient.OracleConnection的用法示例。
在下文中一共展示了OracleConnection.GetScratchBuffer方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: GetPersistedRowid
internal static OracleString GetPersistedRowid(OracleConnection connection, OciRowidDescriptor rowidHandle)
{
OracleString @null = OracleString.Null;
if (rowidHandle != null)
{
OciErrorHandle errorHandle = connection.ErrorHandle;
NativeBuffer scratchBuffer = connection.GetScratchBuffer(0xf82);
bool success = false;
bool flag = false;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
int num;
scratchBuffer.DangerousAddRef(ref success);
if (OCI.ClientVersionAtLeastOracle9i)
{
int length = scratchBuffer.Length;
num = TracedNativeMethods.OCIRowidToChar(rowidHandle, scratchBuffer, ref length, errorHandle);
if (num != 0)
{
connection.CheckError(errorHandle, num);
}
return new OracleString(scratchBuffer.PtrToStringAnsi(0, length));
}
rowidHandle.DangerousAddRef(ref flag);
OciServiceContextHandle serviceContextHandle = connection.ServiceContextHandle;
OciStatementHandle stmtp = new OciStatementHandle(serviceContextHandle);
string stmt = "begin :rowid := :rdesc; end;";
int offset = 0;
int num6 = 4;
int num5 = 8;
int num3 = 12;
int num2 = 0x10;
int num4 = 20;
try
{
IntPtr ptr;
IntPtr ptr2;
num = TracedNativeMethods.OCIStmtPrepare(stmtp, errorHandle, stmt, OCI.SYNTAX.OCI_NTV_SYNTAX, OCI.MODE.OCI_DEFAULT, connection);
if (num != 0)
{
connection.CheckError(errorHandle, num);
}
scratchBuffer.WriteIntPtr(num5, rowidHandle.DangerousGetHandle());
scratchBuffer.WriteInt32(offset, 0);
scratchBuffer.WriteInt32(num6, 4);
scratchBuffer.WriteInt32(num3, 0);
scratchBuffer.WriteInt32(num2, 0xf6e);
num = TracedNativeMethods.OCIBindByName(stmtp, out ptr2, errorHandle, "rowid", 5, scratchBuffer.DangerousGetDataPtr(num4), 0xf6e, OCI.DATATYPE.VARCHAR2, scratchBuffer.DangerousGetDataPtr(num3), scratchBuffer.DangerousGetDataPtr(num2), OCI.MODE.OCI_DEFAULT);
if (num != 0)
{
connection.CheckError(errorHandle, num);
}
num = TracedNativeMethods.OCIBindByName(stmtp, out ptr, errorHandle, "rdesc", 5, scratchBuffer.DangerousGetDataPtr(num5), 4, OCI.DATATYPE.ROWID_DESC, scratchBuffer.DangerousGetDataPtr(offset), scratchBuffer.DangerousGetDataPtr(num6), OCI.MODE.OCI_DEFAULT);
if (num != 0)
{
connection.CheckError(errorHandle, num);
}
num = TracedNativeMethods.OCIStmtExecute(serviceContextHandle, stmtp, errorHandle, 1, OCI.MODE.OCI_DEFAULT);
if (num != 0)
{
connection.CheckError(errorHandle, num);
}
if (scratchBuffer.ReadInt16(num3) == -1)
{
return @null;
}
@null = new OracleString(scratchBuffer, num4, num2, MetaType.GetMetaTypeForType(OracleType.RowId), connection, false, true);
GC.KeepAlive(rowidHandle);
}
finally
{
OciHandle.SafeDispose(ref stmtp);
}
}
finally
{
if (flag)
{
rowidHandle.DangerousRelease();
}
if (success)
{
scratchBuffer.DangerousRelease();
}
}
}
return @null;
}