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C# Datatable Disable Constraints

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C#VB Copy ForeignKeyConstraint custOrderFK = new ForeignKeyConstraint("CustOrderFK", custDS.Tables["CustTable"].Columns["CustomerID"], custDS.Tables["OrdersTable"].Columns["CustomerID"]); custOrderFK.DeleteRule = Rule.None; // Cannot delete a customer value that has associated existing orders. Have a look at all_indexes to see if there is an index called A_DUP_CALLE_UK1 and try and figure out if it is used by something else before you drop it! Invalid Datatype. If you specify neither CASCADE nor RESTRICT, the default is CASCADE.

more hot questions question feed lang-sql about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation The valid default length range for SQL Server data types nchar and nvarchar is 1-4000. Run a query, put the results into the table. Any supported table-level constraint type can be added via ALTER TABLE.

C# Datatable Disable Constraints

just kidding, but I've spent a day > > and a half on this now and I'm about to crack, I know it. > > > > Thanks, > > > You must select a database reference or connection. Literal of the correct data type required. To do so the column must not be used in a PRIMARY KEY constraint.

I have an ever-changing set of queries, the results of which are all > intersected with one another. An error occurred creating the Show Differences window. In this case, the EnforceConstraints property is set to false, and all rows that are invalid are marked in error. Datatable Constraints Any help? –SKINDER Mar 31 '11 at 13:01 @Mitch Wheat: I have found a link to my table - it is object_id, but I cannot find a link to

Received on Wed May 30 2001 - 10:32:45 CDT This message: [ Message body ] Next message: Ray Stell: "Re: backspace in Oracle." Previous message: Smith, Ron L.: "Build an exact Failed To Enable Constraints. One Or More Rows Contain Values Violating Non-null ALTER TABLE Activities ADD PRIMARY KEY (city_id, activity); -- Drop the city_id column if there are no dependent objects: ALTER TABLE Cities DROP COLUMN city_id RESTRICT; -- Drop the city_id column, Hence, > D.Tables(1).Constraints.RemoveAt(0) will only remove the primary key > constraint and not the foreign key constraint. http://stackoverflow.com/questions/5499574/how-to-drop-a-unique-constraint-from-table-column Not the one that is causing the issue.

If any constraints cannot be enabled at the end of merge, a ConstraintException is generated and the merged data is retained while the constraints are disabled. System.data.constraintexception: Failed To Enable Constraints How to react? Query file is corrupted. SQL Execution Error.

Failed To Enable Constraints. One Or More Rows Contain Values Violating Non-null

I had not named the constraints explicitly, thus system gave it it's own generated name Relationship142 and other NOT NULL Constraint was given name SYS_C0015910. https://msdn.microsoft.com/en-us/library/st1t2c35(v=vs.110).aspx Name entered is not valid. C# Datatable Disable Constraints Thanks, Jeff ====================================== Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim D As New DataSet Dim T1 As New DataTable Dim T2 As New DataTable 'add Relax Or Turn Off Constraints In Your Dataset at > >System.Data.UniqueConstraint.CanBeRemovedFromCollection... > .

Table already exists. (Visual Database Tools) Table has no columns. (Visual Database Tools) Table is marked for deletion and was not added to the diagram. (Visual Database Tools) This is my pillow How to make my logo color look the same in Web & Print? Also, I tried using the column property Unique rather than setting a Primary Key: Below is some test code I put into a standard windows application. Deleting the selected columns will also delete relationships. (Visual Database Tools) Differences were detected in the specified object while you were working on it. Cannot Remove This Column, Because It Is Part Of The Parent Key For Relationship

Missing subquery or the operator you entered requires parenthesis. To increase the width of a column of these types, specify the data type and new size after the column name. The valid range for 'SQL query time-out' is 1-65535. If you specify RESTRICT, then the column drop will be rejected if it would cause a dependent schema object to become invalid.

Select both primary key table and foreign key table before selecting any field for the relationship. (Visual Database Tools) Setting for Length must be from to . (Visual Database Tools) Datatable Primary Key Cannot find document. PC Review Home Newsgroups > Microsoft DotNet > Microsoft ADO .NET > Home Home Quick Links Search Forums Recent Posts Forums Forums Quick Links Search Forums Recent Posts Articles Articles Quick

Check: select * from ALL_OBJECTS where OBJECT_NAME = 'PK_TBL_CONSTR'; and you see OBJECT_TYPE is INDEX.

I'm trying to get it to work in an > > asp > > > using the DataSet at follows: > > > > > > Start off with one table. I think I need that > > > because some of my > > > >queries should only get populated into DT2 where they > > > have existing parents > Remove the first table myDataSet.Tables(0). Datatable Already Belongs To Another Dataset. Project file is corrupted.

Error in join expression: Stringname not recognized. All columns included in a primary key must contain non null data and be unique. etc etc." > > > >As you can see above, I DID remove the relationship. > > > >I tried modifying the above code as follows: > > > >myDataSet.Relations.RemoveAt(0) > Anyway, > it > > tells me that, before removing constraint 0 I must remove constraint > 'Rel1'. > > Well, Rel1 is the name of my relation, not the constraint.

The total size of an index or primary key cannot exceed 900 bytes. Query Designer supports no more than 1 table for this type of query. It's amazing how much time gets spent stuck on stupid little things like this that you would ASSUME are fairly straight forward -- I want to delete a table. if (domain.Tables["TABLE_NAME"] != null) { for (int f = domain.Tables["TABLE_NAME"].ChildRelations.Count -1; f >=0; f--) { domain.Tables["TABLE_NAME"].ChildRelations[f].ChildTable.Constraints.Remove(domain.Tables["TABLE_NAME"].ChildRelations[f].RelationName); domain.Tables["TABLE_NAME"].ChildRelations.RemoveAt(f); } domain.Tables["TABLE_NAME"].ChildRelations.Clear(); domain.Tables["TABLE_NAME"].ParentRelations.Clear(); domain.Tables["TABLE_NAME"].Constraints.Clear(); domain.Tables.Remove("TABLE_NAME"); } .net datatable dataset foreign-keys constraints share|improve this question

When you > > > > remove the relation the constraint is not removed > > > > automatically, so the table deletion fails. > > > > > > > I'm handling it by doing a query, then doing another query, intersecting the results with the first, then another, etc... If you remove a column from the PrimaryKey property of a DataTable, the UniqueConstraint is removed.The following example creates a UniqueConstraint for two columns of a DataTable. I have an ever-changing set of queries, the results of which are > all > > intersected with one another.

up vote 2 down vote favorite I cannot set any constraints in my datatable if i merge two datatables dt1.Merge(dt2); It shows error like this Failed to enable constraints. File specified not found. Alternatively, you could do both of these commands at the same time with the command alter table t drop constraint u1 including indexes; share|improve this answer edited May 14 '15 at I'm handling it by doing a query, then > > doing > > > another query, intersecting the results with the first, then another, > > etc... > > > >

Object name cannot begin with #. (Visual Database Tools) Object with name already exists in the database. (Visual Database Tools) ODBC driver returned an invalid ODBC version and needs to be