в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:18:59Z

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==Catch SqlClient.SqlException==

<source lang="csharp">using System;
using System.Data;
using System.Data.SqlClient;
class MainClass
{
static void Main()
{
SqlConnection conn = new SqlConnection(@"data source = .\sqlexpress;integrated security = true;database = northwind");
SqlCommand cmd = conn.CreateCommand();
cmd.rumandType = CommandType.StoredProcedure;
cmd.rumandText = "sp_DbException_1";
try
{
conn.Open();
cmd.ExecuteNonQuery();
}
catch (System.Data.SqlClient.SqlException ex)
{
Console.WriteLine("Source: " + ex.Source);
Console.WriteLine("Number: "+ ex.Number.ToString());
Console.WriteLine("Message: "+ ex.Message);
Console.WriteLine("Class: "+ ex.Class.ToString ());
Console.WriteLine("Procedure: "+ ex.Procedure.ToString());
Console.WriteLine("Line Number: "+ex.LineNumber.ToString());
Console.WriteLine("Server: "+ ex.Server.ToString());
}
catch (System.Exception ex)
{
Console.WriteLine("Source: " + ex.Source);
Console.WriteLine("Exception Message: " + ex.Message);
}
finally
{
if (conn.State == ConnectionState.Open)
{
Console.WriteLine("Finally block closing the connection");
conn.Close();
}
}
}
}</source>

==Catch SqlException when opening connection==

<source lang="csharp">using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.OleDb;
using System.Data.SqlClient;
using System.IO;
public class MainClass{
public static void Main(){
string ConnectionString ="server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI;";
SqlConnection conn = new SqlConnection(ConnectionString);
try
{
conn.Open();
}
catch(SqlException ae)
{
Console.WriteLine("{0}: Threw an Error: ***{1}***"+
"with SqlServer Code {2}",
ae.Errors[0].Server,
ae.Errors[0].Message,ae.Errors[0].Number);
}
}
}</source>

==Loop through all errors==

<source lang="csharp">using System;
using System.Data;
using System.Data.SqlClient;
class MainClass
{
static void Main()
{
SqlConnection conn = new SqlConnection(@"data source = .\sqlexpress;integrated security = true;database = northwnd");
SqlCommand cmd = conn.CreateCommand();
cmd.rumandType = CommandType.StoredProcedure;
cmd.rumandText = "error command";
try
{
conn.Open();
cmd.ExecuteNonQuery();
}
catch (System.Data.SqlClient.SqlException ex)
{
for (int i = 0; i < ex.Errors.Count; i++)
{
Console.WriteLine("Index #" + i);
Console.WriteLine("Exception: " + ex.Errors[i].ToString() );
Console.WriteLine("Number: " + ex.Errors[i].Number.ToString() );
}
}
catch (System.Exception ex)
{
Console.WriteLine("Source: " + ex.Source);
Console.WriteLine("Exception Message: " + ex.Message);
}
finally
{
if (conn.State == ConnectionState.Open)
{
Console.WriteLine("Finally block closing the connection");
conn.Close();
}
}
}
}</source>
<pre class=codeResult>Index #0
Exception: System.Data.SqlClient.SqlError: Cannot open database "northwnd" requested by the login. T
he login failed.
Number: 4060
Index #1
Exception: System.Data.SqlClient.SqlError: Login failed for user "nfex\Joe".
Number: 18456</pre>

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Csharp/CSharp Tutorial/ADO.Net/SqlException - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия