本文整理汇总了C#中System.Data.Odbc.OdbcConnectionStringBuilder.TryGetValue方法的典型用法代码示例。如果您正苦于以下问题：C# OdbcConnectionStringBuilder.TryGetValue方法的具体用法？C# OdbcConnectionStringBuilder.TryGetValue怎么用？C# OdbcConnectionStringBuilder.TryGetValue使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Data.Odbc.OdbcConnectionStringBuilder的用法示例。
在下文中一共展示了OdbcConnectionStringBuilder.TryGetValue方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Main
//引入命名空间
using System.Data.Odbc;
class Program
{
static void Main()
{
OdbcConnectionStringBuilder builder =
new OdbcConnectionStringBuilder();
builder.ConnectionString = GetConnectionString();
// Call TryGetValue method for multiple
// key names. Demonstrate that the search is not
// case sensitive.
DisplayValue(builder, "Driver");
DisplayValue(builder, "SERVER");
// How about a property you did not set?
DisplayValue(builder, "DNS");
// Invalid keys?
DisplayValue(builder, "Invalid Key");
// Null values?
DisplayValue(builder, null);
Console.WriteLine("Press any key to continue.");
Console.ReadLine();
}
private static 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 "Driver={SQL Server};Server=(local);" +
"Database=AdventureWorks;Trusted_Connection=yes;";
}
private static void DisplayValue(OdbcConnectionStringBuilder builder, string key)
{
object value = null;
// Although TryGetValue handles missing keys,
// it does not handle passing in a null (Nothing in Visual Basic)
// key. This example traps for that particular error, but
// throws any other unknown exceptions back out to the
// caller.
try
{
if (builder.TryGetValue(key, out value))
{
Console.WriteLine("{0}='{1}'", key, value);
}
else
{
Console.WriteLine("Unable to retrieve value for '{0}'", key);
}
}
catch (ArgumentNullException ex)
{
Console.WriteLine("Unable to retrieve value for null key.");
}
}
}