Xmldatadocument dataset null values

SqlTypes will return a SqlBoolean. However, you can't prevent different connections from setting null options for that connection. Null values are special, and their storage and assignment semantics differ across different type systems and storage systems. A Dataset is designed to be used with different type and storage systems. This section describes the null semantics for assigning null values to a DataColumn in a DataRow across the different type systems.

Value This assignment is valid for a DataColumn of any type. Value is coerced into the appropriate strongly typed Null value. Null All System. SqlTypes data types implement INullable. If the strongly typed null value can be converted into the column's data type using implicit cast operators, the assignment should go through.

Otherwise an invalid cast exception is thrown. In this case, if a strongly typed null value associated with the derived class is assigned, it is stored as an untyped DbNull. Value , because null storage is always consistent with the DataColumn's data type. The default value for any System. SqlTypes instance is null. Nulls in System.

SqlTypes are type-specific and cannot be represented by a single value, such as DbNull. Foliate ElementState. Deleted ; node. Proposed : DataRowVersion. Current ; foreach DataColumn col in row. SetAttribute col. EncodedColumnName , col. Namespace , col. Empty , col. Namespace , this ; newNode. AppendChild CreateTextNode col.

ConvertObjectToXml value ; if priorNode! InsertBefore newNode , node. Assert col. ConvertObjectToXml value ; if node. FirstChild ; else node. XSINS ; attr. TRUE ; node. SetAttributeNode attr ; this. FirstChild ; node! GetRowFromElement e! Nested list. NestedParentRelations ; if relations. Assert row. Assert pointer!

See for more info about why this was changed from DataSet. Assert DataSet. Assert newNode! AddPointer ; if newNode. MoveToOwnerElement ; if dp. MoveToNextSibling newNode. CloneNode false ; clone. Init this. Clone ; clone. EnforceConstraints ; Debug. Assert clone. CloneNode dp ; clone. DocumentFragment : return this. CreateDocumentType dp. Name , dp. PublicId , dp. SystemId , dp.

InternalSubset ; case XmlNodeType. XmlDeclaration : return this. CreateXmlDeclaration dp. Version , dp. Encoding , dp. CreateNotation dp. Name, dp. PublicId, dp. Text : return this. CreateTextNode dp. Value ; case XmlNodeType. CDATA : return this. CreateCDataSection dp.

ProcessingInstruction : return this. CreateProcessingInstruction dp. Comment : return this. CreateComment dp. Try asking the Reporting Services forum. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful? Please rate your experience Yes No. Gets the first child of the node.

Gets a value indicating whether this node has any child nodes. Gets or sets the markup representing the children of the current node. Gets a value indicating whether the current node is read-only. Item[String, String]. Gets the last child of the node.

Gets the local name of the node. Gets the qualified name of the node. Gets the namespace URI of this node.

Gets the node immediately following this node. Gets the type of the current node. Gets the markup containing this node and all its child nodes.

Gets the parent node of this node for nodes that can have parents. Gets or sets the namespace prefix of this node. Gets or sets a value indicating whether to preserve white space in element content. Gets the node immediately preceding this node. Gets the text node that immediately precedes this node. Gets or sets the value of the node. AppendChild XmlNode. Adds the specified node to the end of the list of child nodes, of this node. Creates a duplicate of this node.

CloneNode Boolean. CreateAttribute String. CreateAttribute String, String. CreateAttribute String, String, String. CreateCDataSection String. CreateComment String. Creates a default attribute with the specified prefix, local name and namespace URI.

CreateElement String. Creates an element with the specified name. CreateElement String, String. CreateElement String, String, String. CreateEntityReference String. CreateNavigator XmlNode. CreateNode String, String, String. CreateProcessingInstruction String, String. CreateSignificantWhitespace String. CreateTextNode String. CreateWhitespace String. Equals Object.