添加项目文件。

Sai.Toolkit.Mvvm/Converters/SearchValueConverter.cs

@@ -0,0 +1,22 @@
+using System.Windows.Data;
+
+namespace Sai.Toolkit.Mvvm.Converters;
+
+public class SearchValueConverter : IMultiValueConverter
+{
+    public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+    {
+        var cellText = values[0] == null ? string.Empty : values[0].ToString();
+        var searchText = values[1] as string;
+        if (!string.IsNullOrEmpty(searchText) && !string.IsNullOrEmpty(cellText))
+        {
+            return cellText.ToLower().Contains(searchText.ToLower());
+        }
+        return false;
+    }
+
+    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
+    {
+        return null;
+    }
+}