显示datagridview的是/否，而不是真/假

问题描述：

有是在的datagridview显示数据库表内容的形式，表类型的一列是布尔值，所以在显示的datagridview真/假，但我想自定义显示是/否。
你认为哪种方式？

There is datagridview in a form that shows content of table of database, one column of table type is boolean, so in datagridview shows true/false, but i want to customize it to show Yes/No. which way you suggest?

答

当涉及到自定义格式，两种可能的解决方案来在我的脑海。

When it comes to custom formatting, two possible solutions comes in my mind.

1.Handle CellFormatting 事件和格式化你自己的。

1.Handle CellFormatting event and format your own.

void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
     if (e.ColumnIndex == yourcolumnIndex)
     {
         if (e.Value is bool)
         {
             bool value = (bool)e.Value;
             e.Value = (value) ? "Yes" : "No";
             e.FormattingApplied = true;
         }
     }
 }

2，使用自定义格式化

public class BoolFormatter : ICustomFormatter, IFormatProvider
{
    public object GetFormat(Type formatType)
    {
        if (formatType == typeof(ICustomFormatter))
        {
            return this;
        }
        return null;
    }

    public string Format(string format, object arg, IFormatProvider formatProvider)
    {
        if (arg == null)
        {
            return string.Empty;
        }

        bool value = (bool)arg;
        switch (format ?? string.Empty)
        {
             case "YesNo":
                {
                    return (value) ? "Yes" : "No";
                }
            case "OnOff":
                {
                    return (value) ? "On" : "Off";
                }
            default:
                {
                    return value.ToString();//true/false
                }
        }
    }
 }

然后使用它像这样，和处理 CellFormatting 事件，使其工作

dataGridView1.Columns[1].DefaultCellStyle.FormatProvider = new BoolFormatter();
dataGridView1.Columns[1].DefaultCellStyle.Format = "YesNo";

void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
     if (e.CellStyle.FormatProvider is ICustomFormatter)
     {
         e.Value = (e.CellStyle.FormatProvider.GetFormat(typeof(ICustomFormatter)) as ICustomFormatter).Format(e.CellStyle.Format, e.Value, e.CellStyle.FormatProvider);
         e.FormattingApplied = true;
     }
 }

修改
您可以订阅 CellFormatting 事件像这样

dataGridView1.CellFormatting += dataGridView1_CellFormatting;

希望这有助于

显示datagridview的是/否，而不是真/假

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