HOW TO：列出資料物件中的資料格式
更新：2007 年 11 月
下列範例顯示如何使用 GetFormats 方法多載，取得代表資料物件中每個可用資料格式之字串的陣列。
範例
說明
下列範例程式碼會使用 GetFormats 多載取得字串陣列，這個字串陣列表示資料物件中所有可用的資料格式 (包括原生格式和可自動轉換的格式)。
程式碼
DataObject dataObject = new DataObject("Some string data to store...");
// Get an array of strings, each string denoting a data format
// that is available in the data object. This overload of GetDataFormats
// returns all available data formats, native and auto-convertible.
string[] dataFormats = dataObject.GetFormats();
// Get the number of data formats present in the data object, including both
// auto-convertible and native data formats.
int numberOfDataFormats = dataFormats.Length;
// To enumerate the resulting array of data formats, and take some action when
// a particular data format is found, use a code structure similar to the following.
foreach (string dataFormat in dataFormats)
{
if (dataFormat == DataFormats.Text)
{
// Take some action if/when data in the Text data format is found.
break;
}
else if(dataFormat == DataFormats.StringFormat)
{
// Take some action if/when data in the string data format is found.
break;
}
}
範例
說明
下列範例程式碼使用 GetFormats 多載，取得僅代表資料物件中可用資料格式之字串的陣列 (可自動轉換的資料格式會篩選掉)。
程式碼
DataObject dataObject = new DataObject("Some string data to store...");
// Get an array of strings, each string denoting a data format
// that is available in the data object. This overload of GetDataFormats
// accepts a Boolean parameter inidcating whether to include auto-convertible
// data formats, or only return native data formats.
string[] dataFormats = dataObject.GetFormats(false /* Include auto-convertible? */);
// Get the number of native data formats present in the data object.
int numberOfDataFormats = dataFormats.Length;
// To enumerate the resulting array of data formats, and take some action when
// a particular data format is found, use a code structure similar to the following.
foreach (string dataFormat in dataFormats)
{
if (dataFormat == DataFormats.Text)
{
// Take some action if/when data in the Text data format is found.
break;
}
}