в 15:31, 26 мая 2010

2010-05-26T15:31:35Z

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2010-05-26T12:10:56Z

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==new SqlParameter==

<source lang="csharp">
using System;
using System.Data;
using System.Data.SqlClient;
class MainClass
{
static void Main(string[] args)
{
SqlConnection cn = new SqlConnection("Data Source=(local); Initial Catalog = MyDatabase; User ID=sa;Password=");
SqlCommand cmd = new SqlCommand("MyStoredProcedure", cn);
cmd.rumandType = CommandType.StoredProcedure;
SqlParameter param = new SqlParameter("@ReturnValue", SqlDbType.Int);
cmd.Parameters.Add(param);
cmd.Parameters.Add("MyFirstParameter", SqlDbType.Int);
cmd.Parameters.Add("MySecondParameter", SqlDbType.Int).Direction =
ParameterDirection.Output;
SqlDataAdapter da = new SqlDataAdapter(cmd);

}
}

</source>

==SqlParameter.ParameterName==

<source lang="csharp">

using System;
using System.Data;
using System.Data.SqlClient;
class MainClass
{
public static void Main()
{
using (SqlConnection con = new SqlConnection())
{
con.ConnectionString = @"Data Source = .\sqlexpress;Database = Northwind; Integrated Security=SSPI";
con.Open();

string employeeID = "5";
string title = "Cleaner";

using (SqlCommand com = con.CreateCommand())
{
com.rumandType = CommandType.Text;
com.rumandText = "UPDATE Employee SET Title = @title" +
" WHERE Id = @Employeeid";

// Create a SqlParameter object for the title parameter.
SqlParameter p1 = com.CreateParameter();
p1.ParameterName = "@title";
p1.SqlDbType = SqlDbType.VarChar;
p1.Value = title;
com.Parameters.Add(p1);

// Use a shorthand syntax to add the id parameter.
com.Parameters.Add("@Employeeid", SqlDbType.Int).Value = employeeID;

// Execute the command and process the result.
int result = com.ExecuteNonQuery();

if (result == 1)
{
Console.WriteLine("Employee {0} title updated to {1}.",
employeeID, title);
}
else
{
Console.WriteLine("Employee {0} title not updated.",
employeeID);
}
}
}
}
}

</source>

==SqlParameter.SourceVersion==

<source lang="csharp">

using System;
using System.Data;
using System.Data.SqlClient;
class PropagateChanges {
static void Main(){
string connString = "server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
string qry = @"select * from employee ";
string upd = @"update employee set firstname = @firstname where id = @id";
SqlConnection conn = new SqlConnection(connString);
try {
SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = new SqlCommand(qry, conn);
DataSet ds = new DataSet();
da.Fill(ds, "employee");
DataTable dt = ds.Tables["employee"];
dt.Rows[0]["firstname"] = "W";
foreach (DataRow row in dt.Rows){
Console.WriteLine(
"{0} {1}",
row["firstname"].ToString().PadRight(15),
row["lastname"].ToString().PadLeft(25));
}
// Update employees
SqlCommand cmd = new SqlCommand(upd, conn);
cmd.Parameters.Add("@firstname",SqlDbType.NVarChar,15, "firstname");
SqlParameter parm = cmd.Parameters.Add("@id",SqlDbType.Int,4,"id");
parm.SourceVersion = DataRowVersion.Original;
da.UpdateCommand = cmd;
da.Update(ds, "employee");
} catch(Exception e) {
Console.WriteLine("Error: " + e);
} finally {
conn.Close();
}
}
}

</source>

==SqlParameter.Value==

<source lang="csharp">
using System;
using System.Data;
using System.Data.SqlClient;
class MainClass
{
public static void Main()
{
using (SqlConnection con = new SqlConnection())
{
con.ConnectionString = @"Data Source = .\sqlexpress;Database = Northwind; Integrated Security=SSPI";
con.Open();

string employeeID = "5";
string title = "Cleaner";

using (SqlCommand com = con.CreateCommand())
{
com.rumandType = CommandType.Text;
com.rumandText = "UPDATE Employee SET Title = @title" +
" WHERE Id = @Employeeid";

// Create a SqlParameter object for the title parameter.
SqlParameter p1 = com.CreateParameter();
p1.ParameterName = "@title";
p1.SqlDbType = SqlDbType.VarChar;
p1.Value = title;
com.Parameters.Add(p1);

// Use a shorthand syntax to add the id parameter.
com.Parameters.Add("@Employeeid", SqlDbType.Int).Value = employeeID;

// Execute the command and process the result.
int result = com.ExecuteNonQuery();

if (result == 1)
{
Console.WriteLine("Employee {0} title updated to {1}.",
employeeID, title);
}
else
{
Console.WriteLine("Employee {0} title not updated.",
employeeID);
}
}
}
}
}

</source>

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в 15:31, 26 мая 2010

Admin: 1 версия