DesignParameter.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / System / data / design / DesignParameter.cs / 1 / DesignParameter.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//    Copyright (c) Microsoft Corporation. All Rights Reserved.
//    Information Contained Herein is Proprietary and Confidential.
//  
//-----------------------------------------------------------------------------
 
namespace System.Data.Design { 
    using System.Diagnostics;
    using System; 
    using System.Collections;
    using System.ComponentModel;
    using System.Data;
    using System.Data.Common; 
    using System.Text;
    using System.Globalization; 
 

 

    [
        DataSourceXmlClass(SchemaName.Parameter)
    ] 
    internal class DesignParameter: DataSourceComponent, IDbDataParameter, IDataSourceNamedObject, ICloneable {
 
        private string parameterName; 
        private string columnName;
        private string autogeneratedName; // Used while substituting VSDB-generated parameter names (ParamXx) with our, "pretty" names. 
        private DbType dbType;
        private byte precision;
        private byte scale;
        private int size; 
        private string dataTypeServer;
        private ParameterDirection direction; 
        private string sourceColumn; 
        private DataRowVersion sourceVersion;
        private string dataSourceName; 
        private bool sourceColumnNullMapping;
        private bool allowDbNull;
        private string providerType = null;
 

 
 

        private static int[] adoDataType2DbType = new int[] { 
                (int) ADODataType.adBSTR, (int) DbType.AnsiString,
                (int) ADODataType.adBigInt, (int) DbType.Int64,
                (int) ADODataType.adBinary, (int) DbType.Binary,
                (int) ADODataType.adBoolean, (int) DbType.Boolean, 
                (int) ADODataType.adChar, (int) DbType.AnsiString,
                (int) ADODataType.adCurrency, (int) DbType.Currency, 
                (int) ADODataType.adDate, (int) DbType.Date, 
                (int) ADODataType.adDBDate, (int) DbType.Date,
                (int) ADODataType.adDBTime, (int) DbType.DateTime, 
                (int) ADODataType.adDBTimeStamp, (int) DbType.DateTime,
                (int) ADODataType.adDecimal, (int) DbType.Decimal,
                (int) ADODataType.adDouble, (int) DbType.Double,
                (int) ADODataType.adEmpty, (int) DbType.Object, 
                (int) ADODataType.adError, (int) DbType.Object,
                (int) ADODataType.adFileTime, (int) DbType.DateTime, 
                (int) ADODataType.adGUID, (int) DbType.Guid, 
                (int) ADODataType.adIDispatch, (int) DbType.Object,
                (int) ADODataType.adIUnknown, (int) DbType.Object, 
                (int) ADODataType.adInteger, (int) DbType.Int32,
                (int) ADODataType.adLongVarBinary, (int) DbType.Binary,
                (int) ADODataType.adLongVarChar, (int) DbType.AnsiString,
                (int) ADODataType.adLongVarWChar, (int) DbType.String, 
                (int) ADODataType.adNumeric, (int) DbType.Decimal,
                (int) ADODataType.adPropVariant, (int) DbType.Object, 
                (int) ADODataType.adSingle, (int) DbType.Single, 
                (int) ADODataType.adSmallInt, (int) DbType.Int16,
                (int) ADODataType.adTinyInt, (int) DbType.SByte, 
                (int) ADODataType.adUnsignedBigInt, (int) DbType.UInt64,
                (int) ADODataType.adUnsignedInt, (int) DbType.UInt32,
                (int) ADODataType.adUnsignedSmallInt, (int) DbType.UInt16,
                (int) ADODataType.adUnsignedTinyInt, (int) DbType.Byte, 
                (int) ADODataType.adVarBinary, (int) DbType.Binary,
                (int) ADODataType.adVarChar, (int) DbType.AnsiString, 
                (int) ADODataType.adVarNumeric, (int) DbType.VarNumeric, 
                (int) ADODataType.adVarWChar, (int) DbType.String,
                (int) ADODataType.adVariant, (int) DbType.Object, 
                (int) ADODataType.adWChar, (int) DbType.String
            };

 

        [ 
            DataSourceXmlAttribute(), 
            DefaultValue(false)
        ] 
        public bool AllowDbNull {
            get {
                return this.allowDbNull;
            } 
            set {
                this.allowDbNull = value; 
            } 
        }
 
        [
            DataSourceXmlAttribute(),
            MergableProperty(false),
            DefaultValue(""), 
        ]
        public string ParameterName { 
            get { 
                return this.parameterName;
            } 
            set {
                if (!StringUtil.EqualValue(this.ParameterName, value)) {
                    if (this.CollectionParent != null) {
                        CollectionParent.ValidateUniqueName(this, value); 
                    }
 
                    this.parameterName = value; 
                }
            } 
        }

        [
            DataSourceXmlAttribute() 
        ]
        public string ColumnName { 
            get { 
                return this.columnName;
            } 
            set {
                this.columnName = value;
            }
        } 

        [ 
            DataSourceXmlAttribute(), 
            Browsable(false)
        ] 
        public string AutogeneratedName {
            get {
                return this.autogeneratedName;
            } 
            set {
                this.autogeneratedName = value; 
            } 
        }
 
        [
            DataSourceXmlAttribute()
        ]
        public DbType DbType { 
            get {
                return this.dbType; 
            } 
            set {
                this.dbType = value; 
            }
        }

        [ 
            DataSourceXmlAttribute()
        ] 
        public string ProviderType { 
            get {
                return this.providerType; 
            }
            set {
                this.providerType = value;
            } 
        }
 
        [ 
            DataSourceXmlAttribute(),
            DefaultValueAttribute((byte)0) 
        ]
        public byte Precision {
            get {
                return this.precision; 
            }
            set { 
                this.precision = value; 
            }
        } 

        [
            DataSourceXmlAttribute(),
            DefaultValueAttribute((byte)0) 
        ]
        public byte Scale { 
            get { 
                return this.scale;
            } 
            set {
                this.scale = value;
            }
        } 

        [ 
            DataSourceXmlAttribute(), 
            DefaultValueAttribute((int)0)
        ] 
        public int Size {
            get {
                return this.size;
            } 
            set {
                this.size = value; 
                // For BLOBs VSDB will return 0xffffffff; 
                if( this.size < 0 ) {
                    this.size = int.MaxValue; 
                }
            }
        }
 
        [
            DataSourceXmlAttribute(), 
            Browsable(false) 
        ]
        public string DataTypeServer { 
            get {
                return this.dataTypeServer;
            }
            set { 
                this.dataTypeServer = value;
            } 
        } 

        [ 
            DataSourceXmlAttribute(),
            DefaultValue(ParameterDirection.Input)
        ]
        public ParameterDirection Direction { 
            get {
                return this.direction; 
            } 
            set {
                this.direction = value; 
            }
        }

        [ 
            DefaultValue(""),
            DataSourceXmlAttribute() 
        ] 
        public string SourceColumn {
            get { 
                return this.sourceColumn;
            }
            set {
                this.sourceColumn = value; 
            }
        } 
 
        [
            DefaultValue(DataRowVersion.Current), 
            DataSourceXmlAttribute()
        ]
        public DataRowVersion SourceVersion {
            get { 
                return this.sourceVersion;
            } 
            set { 
                this.sourceVersion = value;
            } 
        }

        [
            DataSourceXmlAttribute(), 
            Browsable(false)
        ] 
        public string DataSourceName { 
            get {
                return this.dataSourceName; 
            }
            set {
                this.dataSourceName = value;
            } 
        }
 
        string INamedObject.Name { 
            get {
                return ParameterName; 
            }
            set {
                ParameterName = value;
            } 
        }
 
        string IDataSourceNamedObject.PublicTypeName { 
            get {
                return "Parameter"; 
            }
        }

        [ 
            Browsable(false),
            DefaultValue(false), 
            DesignOnly(true), 
            EditorBrowsableAttribute(EditorBrowsableState.Never)
        ] 
        public bool IsNullable {
            get {
                return true;
            } 
        }
 
        [Browsable(false), DefaultValue(null)] 
        public object Value {
            get { 
                return null;
            }
            set {
                // noop 
            }
        } 
 
        /// 
        /// This is for the object collection editor. Overriding ToString() is not enough in case of DesignParameter because 
        /// it is a component. Because of that TypeConverter will try to use Site.Name when converting to string, this will
        /// fail and they will fall back to class name.
        /// If that is not acceptable we should implement a custom type converter for DesignParameter.
        ///  
        [Browsable(false)]
        public string Name { 
            get { 
                return this.ParameterName;
            } 
        }

        [
            DefaultValue(false), 
            DataSourceXmlAttribute()
        ] 
        public bool SourceColumnNullMapping { 
            get {
                return this.sourceColumnNullMapping; 
            }
            set {
                this.sourceColumnNullMapping = value;
            } 
        }
 
 
        public override string ToString() {
            return this.ParameterName; 
        }


        public const string DEFAULT_RETVAL_NAME = "RETURN_VALUE"; 

 
 
        // this constructor is only used by serializor..
        public DesignParameter() : this(String.Empty) { 
        }


        public DesignParameter (string name) { 
            this.parameterName = name;
            this.autogeneratedName = string.Empty; 
            this.direction = ParameterDirection.Input; 
            this.sourceVersion = DataRowVersion.Current;
            this.dataSourceName = string.Empty; 
        }


        public override bool Equals( object o ) { 
            DesignParameter p = o as DesignParameter;
            if( p == null ) return false; 
            return p.ParameterName.Equals( this.ParameterName ); 
        }
 

        // This is just to make compiler happy (because we're overriding Equals( object ) )
        public override int GetHashCode() {
            return this.ParameterName.GetHashCode(); 
        }
 
 
        public object Clone() {
            DesignParameter p = new DesignParameter( this.ParameterName ); 
            p.ColumnName = ColumnName;
            p.AutogeneratedName = AutogeneratedName;
            p.DbType = DbType;
            p.Precision = Precision; 
            p.Scale = Scale;
            p.Size = Size; 
            p.DataTypeServer = DataTypeServer; 
            p.Direction = Direction;
            p.SourceColumn = SourceColumn; 
            p.SourceVersion = SourceVersion;
            p.SourceColumnNullMapping = SourceColumnNullMapping;
            return p;
        } 

 
 
        public static DesignParameter GetDefaultRetvalParam() {
            DesignParameter p =  new DesignParameter( DEFAULT_RETVAL_NAME ); 
            p.DbType = DbType.Int32;
            p.Precision = p.Scale = 0;
            p.Size = 4;
 
            p.Direction = ParameterDirection.ReturnValue;
            return p; 
        } 

    } 

}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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DesignParameter.cs source code in C# .NET

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