Asp.net 根据输入文本框的文本动态更新GridView结果

我想根据文本框中输入的字符动态更新GridView的结果。我的代码目前可以工作，但仅在文本框失去焦点或用户选项卡离开文本框时触发更新。文本框的AutoPost设置为true。我有刷新SQLDataSource的代码，我只希望在用户在文本框中输入字符时进行更新。我想这需要客户端的操作，但不确定从哪里开始。多谢各位

加价

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这可能有助于你完成客户部分：谢谢阿里，我刚刚查看了链接中的信息，我很高兴尝试这种方法。我会报告我的结果。

      <asp:TextBox ID="txtSearch" runat="server" AutoPostBack="True" ViewStateMode="Enabled"></asp:TextBox>
      <asp:Button ID="btnSearch" runat="server" Text="Search" />

      <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1">
        <Columns>
          <asp:BoundField DataField="NameFirst" HeaderText="First Name" SortExpression="NameFirst" />
          <asp:BoundField DataField="NameLast" HeaderText="Last Name" SortExpression="NameLast" />
          <asp:BoundField DataField="Address" HeaderText="Address" SortExpression="Address" />
          <asp:BoundField DataField="City" HeaderText="City" SortExpression="City" />
          <asp:BoundField DataField="State_ID" HeaderText="State" SortExpression="State_ID" />
        </Columns>
      </asp:GridView>

Protected Sub txtSearch_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtSearch.TextChanged
GridData()
End Sub

Private Sub GridData()
    Dim conString As String = ConfigurationManager.ConnectionStrings("MyConnectionString").ToString()
    Dim sqlcon As New SqlConnection(conString)
    Dim sqlcmd As SqlCommand
    Dim da As SqlDataAdapter
    Dim dt As New System.Data.DataTable()
    Dim query As [String]

    If txtsearch.Text = "" Then
      query = "SELECT [Individual_ID], [NameFirst], [NameLast], [Address], [City], [State_ID], [ZipCode], [Comment] FROM [t_Individual] ORDER BY [NameLast], [NameFirst]"
    Else
      query = "SELECT [Individual_ID], [NameFirst], [NameLast], [Address], [City], [State_ID], [ZipCode], [Comment] FROM [t_Individual] WHERE [NameLast] LIKE N'%" + txtSearch.Text + "%' ORDER BY [NameLast], [NameFirst]"
    End If
    sqlcmd = New SqlCommand(query, sqlcon)
    sqlcon.Open()
    da = New SqlDataAdapter(sqlcmd)
    dt.Clear()
    da.Fill(dt)
    If dt.Rows.Count > 0 Then
      GridView1.DataSourceID = ""
      GridView1.DataSource = dt
      GridView1.DataBind()
    Else
      GridView1.DataBind()
    End If
    sqlcon.Close()
  End Sub