c#判断密码

protected void denglu_Click(object sender, EventArgs e)
{
string ys = Convert.ToString(ConfigurationManager.ConnectionStrings["sqlserver"]);
SqlConnection ys1 = new SqlConnection(ys);
ys1.Open();
string ys2 = "select * from jingling where zhanghao='" + zhanghao.Text + "'and mima='" + mima.Text + "'";
SqlCommand ys3 = new SqlCommand(ys2, ys1);
SqlDataReader ys4 = ys3.ExecuteReader();
ys4.Read();
if (this.zhanghao.Text.Trim() == ys4["zhanghao"].ToString().Trim() || this.mima.Text.Trim() == ys4["mima"].ToString().Trim())
{
Session["zhanghao"] = this.zhanghao.Text;
Session["mima"] = this.mima.Text;
Response.Write(mima);
}
else
{
R

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