MTP2.0_CSharp/Muchinfo.MTPClient/Fx4.0/Main/04.Infrastructure/Muchinfo.TASClient.Infrastructure/Converters/StringSubstringConverter.cs

using System;
using System.Windows;
using System.Windows.Data;

namespace Muchinfo.MTPClient.Infrastructure.Converters
{
    //datagrid显示太长（显示部分数据后面跟省略号）
    public class StringSubstringConverter : IValueConverter
    {

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            string result = string.Empty;
            if (value != null)
            {
                string srt = (string)value;
                if (!string.IsNullOrEmpty(srt) && srt.Length > 20)
                {
                    result = srt.Substring(0, 17) + "...";
                }
                else
                {
                    return value;
                }
            }
            return result;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
    //datagrid根据文本长度是否显示tooltip
    public class StringVisableConver : IValueConverter
    {

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            Visibility result = Visibility.Visible;
            string srt = (string)value;
            if (string.IsNullOrWhiteSpace(srt))
            {
                result = Visibility.Collapsed;
            }
            else
            {
                if (srt.Length <= 20)
                {
                    result = Visibility.Collapsed;
                }
            }
            return result;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}