在datagridview中显示是/否而不是真/假

问题描述

表格中有datagridview显示数据库表格的内容，表格类型的一列是布尔值，所以在datagridview中显示真/假，但我想自定义它以显示是/否.你建议哪种方式?

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?

推荐答案

说到自定义格式，我想到了两种可能的解决方案.

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

1.处理CellFormatting事件并自行格式化.

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.使用自定义格式化程序

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
                }
        }
    }
 }

然后像这样使用它，并处理 CellFormatting 事件使其工作

Then use it like this, and handle CellFormatting event to make it work

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;
     }
 }

编辑您可以像这样订阅 CellFormatting 事件

EditYou can subscribe to CellFormatting event like this

dataGridView1.CellFormatting += dataGridView1_CellFormatting;

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