string strCon =
ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
Company.Common.SqlHelper.Connect = strCon;
得到这个例外有人请帮忙
"The type initializer for 'Company.Common.SqlHelper' threw an exception."}
/// <summary>
/// The SqlHelper class is intended to encapsulate high performance, scalable best practices for
/// common uses of SqlClient
/// </summary>
public sealed class SqlHelper
{
public void MessageBox(string message, Control ControlID)
{
//tmp = "<script language='javascript'>";
string tmp = "alert('" + message + "');";
//tmp += "</script>";
//ScriptManager.RegisterStartupScript(this, this.GetType(), "tmp", tmp, true);
//string CloseWindow;
//CloseWindow = "alert('Hello World')";
ScriptManager.RegisterStartupScript(ControlID, ControlID.GetType(), "tmp", tmp, true);
// Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "MyScript", tmp);
}
public static string Connect = ConfigurationManager.ConnectionStrings["Constr"].ConnectionString.ToString();
#region private utility methods & constructors
// Since this class provides only static methods, make the default constructor private to prevent
// instances from being created with "new SqlHelper()"
private SqlHelper() { }
/// <summary>
/// This method is used to attach array of SqlParameters to a SqlCommand.
///
/// This method will assign a value of DbNull to any parameter with a direction of
/// InputOutput and a value of null.
///
/// This behavior will prevent default values from being used, but
/// this will be the less common case than an intended pure output parameter (derived as InputOutput)
/// where the user provided no input value.
/// </summary>
/// <param name="command">The command to which the parameters will be added</param>
/// <param name="commandParameters">An array of SqlParameters to be added to command</param>
private static void AttachParameters(SqlCommand command, SqlParameter[] commandParameters)
{
if (command == null) throw new ArgumentNullException("command");
if (commandParameters != null)
{
foreach (SqlParameter p in commandParameters)
{
if (p != null)
{
// Check for derived output value with no value assigned
if ((p.Direction == ParameterDirection.InputOutput ||
p.Direction == ParameterDirection.Input) &&
(p.Value == null))
{
p.Value = DBNull.Value;
}
command.Parameters.Add(p);
}
}
}
}
}