C# 如何使用RowFilter在GridView中过滤数字和日期？

我正在用C#开发一个web应用程序。我想通过从列表框中选择一列来过滤GridView，然后根据用户使用RowFilter在文本框中键入的文本立即过滤表

我几乎已经完成了整个部分，但我一直在努力解决数字和日期的比较问题

文本的比较效果很好：

DataTable dt = new DataTable();
dt = GridView1.DataSource as DataTable;
dt.DefaultView.RowFilter = string.Format(ListBox1.SelectedItem.Text + " LIKE '%{0}%'", textBox1.Text);

对于数字，我尝试了类似的方法（无效）：

我想数字和日期的比较与文本的比较基本相同？

请看一看

这些是DataGridView上RowFilter的语法规则，包含字符串、数字和日期

字符串

dataView.RowFilter = "Name = 'John'"        // string value
dataView.RowFilter = "Name = 'John ''A'''"  // string with single quotes "John 'A'"
dataView.RowFilter = String.Format("Name = '{0}'", "John 'A'".Replace("'", "''"));

dataView.RowFilter = "Year = 2008"          // integer value
dataView.RowFilter = "Price = 1199.9"       // float value
dataView.RowFilter = String.Format(CultureInfo.InvariantCulture.NumberFormat,
                     "Price = {0}", 1199.9f);

dataView.RowFilter = "Date = #12/31/2008#"          // date value (time is 00:00:00)
dataView.RowFilter = "Date = #2008-12-31#"          // also this format is supported
dataView.RowFilter = "Date = #12/31/2008 16:44:58#" // date and time value
dataView.RowFilter = String.Format(CultureInfo.InvariantCulture.DateTimeFormat,
                     "Date = #{0}#", new DateTime(2008, 12, 31, 16, 44, 58));

数字

dataView.RowFilter = "Name = 'John'"        // string value
dataView.RowFilter = "Name = 'John ''A'''"  // string with single quotes "John 'A'"
dataView.RowFilter = String.Format("Name = '{0}'", "John 'A'".Replace("'", "''"));

dataView.RowFilter = "Year = 2008"          // integer value
dataView.RowFilter = "Price = 1199.9"       // float value
dataView.RowFilter = String.Format(CultureInfo.InvariantCulture.NumberFormat,
                     "Price = {0}", 1199.9f);

dataView.RowFilter = "Date = #12/31/2008#"          // date value (time is 00:00:00)
dataView.RowFilter = "Date = #2008-12-31#"          // also this format is supported
dataView.RowFilter = "Date = #12/31/2008 16:44:58#" // date and time value
dataView.RowFilter = String.Format(CultureInfo.InvariantCulture.DateTimeFormat,
                     "Date = #{0}#", new DateTime(2008, 12, 31, 16, 44, 58));

日期

dataView.RowFilter = "Name = 'John'"        // string value
dataView.RowFilter = "Name = 'John ''A'''"  // string with single quotes "John 'A'"
dataView.RowFilter = String.Format("Name = '{0}'", "John 'A'".Replace("'", "''"));

dataView.RowFilter = "Year = 2008"          // integer value
dataView.RowFilter = "Price = 1199.9"       // float value
dataView.RowFilter = String.Format(CultureInfo.InvariantCulture.NumberFormat,
                     "Price = {0}", 1199.9f);

dataView.RowFilter = "Date = #12/31/2008#"          // date value (time is 00:00:00)
dataView.RowFilter = "Date = #2008-12-31#"          // also this format is supported
dataView.RowFilter = "Date = #12/31/2008 16:44:58#" // date and time value
dataView.RowFilter = String.Format(CultureInfo.InvariantCulture.DateTimeFormat,
                     "Date = #{0}#", new DateTime(2008, 12, 31, 16, 44, 58));

---

我认为以下内容将对您有所帮助

        string colname = ListBox1.SelectedItem.Text;
        string value = textBox1.Text;
        if (colname != null && dt.Columns[colname] != null)
        {
            if ("Byte,Decimal,Double,Int16,Int32,Int64,SByte,Single,UInt16,UInt32,UInt64,".Contains(dt.Columns[colname].DataType.Name + ","))
            {
                dv.RowFilter = colname + "=" + value;
            }
            else if (dt.Columns[colname].DataType == typeof(string))
            {
                dv.RowFilter = string.Format(colname + " LIKE '%{0}%'", value);
            }
            else if (dt.Columns[colname].DataType == typeof(DateTime))
            {
                dv.RowFilter = colname + " = #" + value + "#";
            }
        }

---

它起作用了！非常感谢，这正是我想要的。对我帮助很大。@Dentox9哪些问题？在转换数字或日期并相互比较时出现问题。您的代码使用的是dataView，但我使用的是GridView，因此比较函数之间可能存在差异。然而，桑格拉姆的解决方案解决了这个问题。