SqlDataReader can only check for one of (Null or non null value), To evaluate database fields to determine whether their values are DBNull, you can pass the field value to the DBNull.Value.Equals method. Tags: check if datareader value is not nullsqldatareader check if column is not ...
CheckHeaderIsReady(columnIndex: i, methodName:"IsDBNullAsync"); }catch(Exception ex) {if(!ADP.IsCatchableExceptionType(ex)) {throw; }returnADP.CreatedTaskWithException<bool>(ex); } if((_sharedState._nextColumnHeaderToRead > i) && (!cancellationToken.IsCancellationRequested) && (_currentTask ...
Call IsDBNull to check for null values before calling this method. Applies to Sản phẩmPhiên bản .NET Core 1.0, Core 1.1, 6 (package-provided), 7 (package-provided), 8 (package-provided), 9 (package-provided) .NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5...
CallIsDBNullto check for null values before calling this method. Applies to ProductVersions .NETCore 1.0, Core 1.1, 6 (package-provided), 7 (package-provided), 8 (package-provided), 9 (package-provided), 10 (package-provided) .NET Framework1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5....
(pciSource.DueOff.Subtract(pciSource.DueOn).Days + 1); pdoff.Value = pciTarget.DueOff.AddDays(1.0).AddMonths(iContractLength); cmd.Parameters.Add(pdoff); using (SqlDataReader sdr = cmd.ExecuteReader()) { if (sdr.HasRows) { sdr.Read(); iNewPCID = sdr.IsDBNull(sdr.GetOrdinal("...
CallIsDBNullto check for null values before calling this method. Applies to ProductVersions .NETCore 1.0, Core 1.1, 6 (package-provided), 7 (package-provided), 8 (package-provided), 9 (package-provided), 10 (package-provided) .NET Framework1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5....
SELECTDP1.nameASDatabaseRoleName,isnull(DP2.name,'No Member(s)')ASDatabaseUserNameFROMsys.database_role_membersASDRMRIGHTJOINsys.database_principalsASDP1ONDRM.role_principal_id=DP1.principal_idLEFTJOINsys.database_principalsASDP2ONDRM.member_principal_id=DP2.principal_idWHEREDP1.type='R'; ...
Call IsDBNull to check for null values before calling this method. Requirements Platforms: .NET Compact Framework .NET Framework Security: Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries From Partially Trusted Code...
{ var CheckEmployee = DB.EmpMasters.Where(u => u.EmpName == empmastmv.EmpName.Trim() && u.FatherName == empmastmv.FatherName).FirstOrDefault(); if (CheckEmployee == null) { var newemployee = new EmpMaster(); newemployee.EnrollNumber = empmastmv.EnrollNumber; DB.EmpMasters.Add(...
string photoName = await reader.IsDBNullAsync(0) ? string.Empty : await reader.GetFieldValueAsync<string>(0); // The photo data is also nullable, // so check if there is data available, otherwise we need to return null if (await reader.IsDBNullAsync(1)) { // No ...