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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| using System; | ||
| using System.Data; | ||
| // <Snippet1> | ||
| using Microsoft.Data.SqlClient; | ||
| using System.Data.SqlTypes; | ||
|
|
||
| class Program | ||
| { | ||
| static void Main() | ||
| { | ||
| string connectionString = GetConnectionString(); | ||
| GetSqlTypesAW(connectionString); | ||
| Console.ReadLine(); | ||
| } | ||
| static private void GetSqlTypesAW(string connectionString) | ||
| { | ||
| // Create a DataTable and specify a SqlType | ||
| // for each column. | ||
| DataTable table = new DataTable(); | ||
| DataColumn icolumnolumn = | ||
| table.Columns.Add("SalesOrderID", typeof(SqlInt32)); | ||
| DataColumn priceColumn = | ||
| table.Columns.Add("UnitPrice", typeof(SqlMoney)); | ||
| DataColumn totalColumn = | ||
| table.Columns.Add("LineTotal", typeof(SqlDecimal)); | ||
| DataColumn columnModifiedDate = | ||
| table.Columns.Add("ModifiedDate", typeof(SqlDateTime)); | ||
|
|
||
| // Open a connection to SQL Server and fill the DataTable | ||
| // with data from the Sales.SalesOrderDetail table | ||
| // in the AdventureWorks sample database. | ||
| using (SqlConnection connection = new SqlConnection(connectionString)) | ||
| { | ||
| string queryString = | ||
| "SELECT TOP 5 SalesOrderID, UnitPrice, LineTotal, ModifiedDate " | ||
| + "FROM Sales.SalesOrderDetail WHERE LineTotal < @LineTotal"; | ||
|
|
||
| // Create the SqlCommand. | ||
| SqlCommand command = new SqlCommand(queryString, connection); | ||
|
|
||
| // Create the SqlParameter and assign a value. | ||
| SqlParameter parameter = | ||
| new SqlParameter("@LineTotal", SqlDbType.Decimal); | ||
| parameter.Value = 1.5; | ||
| command.Parameters.Add(parameter); | ||
|
|
||
| // Open the connection and load the data. | ||
| connection.Open(); | ||
| SqlDataReader reader = | ||
| command.ExecuteReader(CommandBehavior.CloseConnection); | ||
| table.Load(reader); | ||
|
|
||
| // Close the SqlDataReader. | ||
| reader.Close(); | ||
| } | ||
|
|
||
| // Display the SqlType of each column. | ||
| Console.WriteLine("Data Types:"); | ||
| foreach (DataColumn column in table.Columns) | ||
| { | ||
| Console.WriteLine(" {0} -- {1}", | ||
| column.ColumnName, column.DataType.UnderlyingSystemType); | ||
| } | ||
|
|
||
| // Display the value for each row. | ||
| Console.WriteLine("Values:"); | ||
| foreach (DataRow row in table.Rows) | ||
| { | ||
| Console.Write(" {0}, ", row["SalesOrderID"]); | ||
| Console.Write(" {0}, ", row["UnitPrice"]); | ||
| Console.Write(" {0}, ", row["LineTotal"]); | ||
| Console.Write(" {0} ", row["ModifiedDate"]); | ||
| Console.WriteLine(); | ||
| } | ||
| } | ||
|
|
||
| static private string GetConnectionString() | ||
| { | ||
| // To avoid storing the connection string in your code, | ||
| // you can retrieve it from a configuration file, using the | ||
| // System.Configuration.ConfigurationSettings.AppSettings property | ||
| return "Data Source=(local);Initial Catalog=AdventureWorks;" | ||
| + "Integrated Security=SSPI;"; | ||
| } | ||
| } | ||
| // </Snippet1> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| // <Snippet1> | ||
| using System; | ||
| using System.Data; | ||
| using Microsoft.Data.SqlClient; | ||
|
|
||
| class Program | ||
| { | ||
| // using Microsoft.Data.SqlClient; | ||
| private static void TestGetValues(DataTableReader reader) | ||
| { | ||
| // Given a DataTableReader, use the GetValues | ||
| // method to retrieve a full row of data. | ||
| // Test the GetValues method, passing in an array large | ||
| // enough for all the columns. | ||
| Object[] values = new Object[reader.FieldCount]; | ||
| int fieldCount = reader.GetValues(values); | ||
|
|
||
| Console.WriteLine("reader.GetValues retrieved {0} columns.", | ||
| fieldCount); | ||
| for (int i = 0; i < fieldCount; i++) | ||
| Console.WriteLine(values[i]); | ||
|
|
||
| Console.WriteLine(); | ||
|
|
||
| // Now repeat, using an array that may contain a different | ||
| // number of columns than the original data. This should work correctly, | ||
| // whether the size of the array is larger or smaller than | ||
| // the number of columns. | ||
|
|
||
| // Attempt to retrieve three columns of data. | ||
| values = new Object[3]; | ||
| fieldCount = reader.GetValues(values); | ||
| Console.WriteLine("reader.GetValues retrieved {0} columns.", | ||
| fieldCount); | ||
| for (int i = 0; i < fieldCount; i++) | ||
| Console.WriteLine(values[i]); | ||
| } | ||
| // </Snippet1> | ||
|
|
||
| // <Snippet2> | ||
| // using Microsoft.Data.SqlClient; | ||
| private static void TestGetValues(SqlDataReader reader) | ||
| { | ||
| // Given a SqlDataReader, use the GetValues | ||
| // method to retrieve a full row of data. | ||
| // Test the GetValues method, passing in an array large | ||
| // enough for all the columns. | ||
| Object[] values = new Object[reader.FieldCount]; | ||
| int fieldCount = reader.GetValues(values); | ||
|
|
||
| Console.WriteLine("reader.GetValues retrieved {0} columns.", | ||
| fieldCount); | ||
| for (int i = 0; i < fieldCount; i++) | ||
| Console.WriteLine(values[i]); | ||
|
|
||
| Console.WriteLine(); | ||
|
|
||
| // Now repeat, using an array that may contain a different | ||
| // number of columns than the original data. This should work correctly, | ||
| // whether the size of the array is larger or smaller than | ||
| // the number of columns. | ||
|
|
||
| // Attempt to retrieve three columns of data. | ||
| values = new Object[3]; | ||
| fieldCount = reader.GetValues(values); | ||
| Console.WriteLine("reader.GetValues retrieved {0} columns.", | ||
| fieldCount); | ||
| for (int i = 0; i < fieldCount; i++) | ||
| Console.WriteLine(values[i]); | ||
| } | ||
| // </Snippet2> | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| using System; | ||
| using System.IO; | ||
| using System.Data; | ||
| using System.Data.SqlTypes; | ||
| using Microsoft.Data.SqlClient.Server; | ||
| using System.Text; | ||
|
|
||
| namespace test | ||
| { | ||
|
|
||
| public class Class1 : IBinarySerialize | ||
| { | ||
|
|
||
| [STAThread] | ||
| static void Main(string[] args) | ||
| { | ||
| string fileName = "info.dat"; | ||
| Class1 temp = new Class1(); | ||
|
|
||
| FileStream fs = new FileStream(fileName, FileMode.Create); | ||
| BinaryWriter w = new BinaryWriter(fs); | ||
|
|
||
| temp.Write(w); | ||
|
|
||
| w.Close(); | ||
| fs.Close(); | ||
|
|
||
| fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); | ||
| BinaryReader r = new BinaryReader(fs); | ||
|
|
||
| temp.Read(r); | ||
|
|
||
| Console.WriteLine("String value: " + temp.StringValue); | ||
| Console.WriteLine("Double value: " + temp.DoubleValue); | ||
|
|
||
| r.Close(); | ||
| fs.Close(); | ||
| } | ||
|
|
||
| public string StringValue; | ||
| public double DoubleValue; | ||
|
|
||
| //<Snippet1> | ||
| // The binary layout is as follows: | ||
| // Bytes 0 - 19: string text, padded to the right with null characters | ||
| // Bytes 20+: Double value | ||
|
|
||
| // using Microsoft.Data.SqlClient.Server; | ||
| public void Read(System.IO.BinaryReader r) | ||
| { | ||
|
|
||
| int maxStringSize = 20; | ||
| char[] chars; | ||
| int stringEnd; | ||
| string stringValue; | ||
| double doubleValue; | ||
|
|
||
| // Read the characters from the binary stream. | ||
| chars = r.ReadChars(maxStringSize); | ||
|
|
||
| // Find the start of the null character padding. | ||
| stringEnd = Array.IndexOf(chars, '\0'); | ||
|
|
||
| if (stringEnd == 0) | ||
| { | ||
| stringValue = null; | ||
| return; | ||
| } | ||
|
|
||
| // Build the string from the array of characters. | ||
| stringValue = new String(chars, 0, stringEnd); | ||
|
|
||
| // Read the double value from the binary stream. | ||
| doubleValue = r.ReadDouble(); | ||
|
|
||
| // Set the object's properties equal to the values. | ||
| this.StringValue = stringValue; | ||
| this.DoubleValue = doubleValue; | ||
| } | ||
| //</Snippet1> | ||
|
|
||
| //<Snippet2> | ||
| // The binary layout is as follows: | ||
| // Bytes 0 - 19: string text, padded to the right with null characters | ||
| // Bytes 20+: Double value | ||
|
|
||
| // using Microsoft.Data.SqlClient.Server; | ||
| public void Write(System.IO.BinaryWriter w) | ||
| { | ||
| int maxStringSize = 20; | ||
| string stringValue = "The value of PI: "; | ||
| string paddedString; | ||
| double value = 3.14159; | ||
|
|
||
| // Pad the string from the right with null characters. | ||
| paddedString = stringValue.PadRight(maxStringSize, '\0'); | ||
|
|
||
| // Write the string value one byte at a time. | ||
| for (int i = 0; i < paddedString.Length; i++) | ||
| { | ||
| w.Write(paddedString[i]); | ||
| } | ||
|
|
||
| // Write the double value. | ||
| w.Write(value); | ||
| } | ||
| //</Snippet2> | ||
| } | ||
| } |
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