Formatting data using the DataFormatString property in C# data binding.

1 year ago
Benjamin Taylor
1 minute

In C#, you can specify the format of data binding using the DataFormatString property. This property, which is a string, can include placeholders and formatting strings. Here are some common formatting strings:

  1. {0}: represents the bound value.
  2. {0:n}: Represents numbers, separates thousands with commas, and keeps two decimal places.
  3. {0:c}: Represents currency, using currency symbol and comma to separate thousands, with two decimal places.
  4. {0:d} represents the date in a short date format.
  5. {0:D} : represents the date in the long date format.
  6. {0:t}: Represents time, in short time format.
  7. {T}: indicates time, using the long time format.

Here are some examples:

// 数字格式化为货币
Label1.Text = String.Format("{0:c}", 123456.789); // 输出：￥123,456.79

// 数字格式化为百分比
Label2.Text = String.Format("{0:p}", 0.123); // 输出：12.30%

// 日期格式化为短日期
Label3.Text = String.Format("{0:d}", DateTime.Now); // 输出：2022/1/1

// 日期格式化为长日期
Label4.Text = String.Format("{0:D}", DateTime.Now); // 输出：2022年1月1日

// 时间格式化为短时间
Label5.Text = String.Format("{0:t}", DateTime.Now); // 输出：上午12:00

// 时间格式化为长时间
Label6.Text = String.Format("{0:T}", DateTime.Now); // 输出：上午12:00:00

These formatting strings can be used in the DataFormatString property of data-bound controls to format the bound data. For example:

<asp:Label ID="Label7" runat="server" Text='<%# Bind("Price", "{0:c}") %>'></asp:Label>

The above code formats the bound data into currency form.

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