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  {
      SqlDataAdapter myda = new SqlDataAdapter("select * from post where postID like'" + TextBox1.Text + "'", myconn);
      DataSet myds = new DataSet();
      myda.Fill(myds, "table");
      myconn.Close();
      DataSet ds = myds;
      GridView1.DataSource = ds;
      GridView1.DataBind();
  }
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  {
    Lable1.Text="Äã²éѯµÄÊý¾Ý²»´æÔÚ£¡";
    TextBox1.Text="";
  }

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SqlDataAdapter myda = new SqlDataAdapter("select * from post where postID like'" + TextBox1.Text + "'", myconn);
      DataSet myds = new DataSet()