我想测试一个可以输入文本框的字数,如果输入>70个字符的,就显示'发送内容过长,请重新输入！',如果<70,则显示'输入成功！'. 可我不知道该怎么显示示'发送内容过长,请重新输入！', 我是在输入成功，弹出一个显示框，显示发送成功，返回． 那如果超过７０个字符，我想显示不成功，怎么办啊？ 因为我想，如果也弹出一个显示框，那返回的时候，不是输入的内容都没有了嘛，所以我想在原来输入的文本框旁边，显示语句，发送不成功，但我不知道该怎么做，请教！！！ 谢谢了．

if(this.textBox1.Text.Length&gt;70)
   {
    MessageBox.Show("发送内容过长,请重新输入");
    return;
   }

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谢谢，这样的话，是输出一个显示框吗

if(TextBox2.Text.Trim().Length&gt;70)
   {
    Response.Write ("&lt;script language='javascript'&gt;alert('发送内容过长,请重新输入！')&lt;/script&gt;");
   
    　　　　
   }



可以吗

用Ｃ＃写的

不行的,你写的是代码

private void Button1_Click(object sender, System.EventArgs e) {

if(TextBox2.Text.Trim().Length>70) { Response.Write ("<script language='javascript'>alert('发送内容过长,请重新输入！')</script>"); } 　　　　 if(TextBox2.Text.Trim().Length<=70) { SqlConnection myconnect = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"]); string temp1 = ""; string str = TextBox1.Text.Trim(); string [] strarr = str.Split(',','，','.','。',' '); //string mobileString = "13\\d{9}";

for(int i=0;i<strarr.Length;i++) {//a //strarr[i]; if((strarr[i].Length!=11) && (strarr[i].Trim()!="")) {//b SqlDataAdapter sqlDataAdapterbm = new SqlDataAdapter("select teamid from userteam where teamname = @teamname",myconnect); DataSet dataSetbm = new DataSet(); sqlDataAdapterbm.SelectCommand.Parameters.Add("@teamname", SqlDbType.Char, 30).Value = strarr[i].Trim(); sqlDataAdapterbm.Fill(dataSetbm,"faults"); if (dataSetbm.Tables["faults"].Rows.Count>0) { temp1 = dataSetbm.Tables["faults"].Rows[0]["teamid"].ToString().Trim(); } if (dataSetbm.Tables["faults"].Rows.Count<1) { temp1 = ""; } if(temp1 != "") {//c SqlDataAdapter sqlDataAdapterbm1 = new SqlDataAdapter("select yonghu,telph from purview1 where teamid = @teamid",myconnect); DataSet dataSetbm1 = new DataSet(); sqlDataAdapterbm1.SelectCommand.Parameters.Add("@teamid", SqlDbType.Char, 4).Value = temp1; sqlDataAdapterbm1.Fill(dataSetbm1,"faults1"); DataTable dt=dataSetbm1.Tables[0]; foreach(DataRow dr in dt.Rows) {//d //string gongsidaima=dr[0].ToString().Trim(); string yonghu=dr[0].ToString().Trim(); string shouji=dr[1].ToString().Trim(); if(yonghu!="") {//e SqlDataAdapter sqlDataAdapterbm2 = new SqlDataAdapter("select * from mobile_info where userid = @userid",sqlConnection2); DataSet dataSetbm2 = new DataSet(); sqlDataAdapterbm2.SelectCommand.Parameters.Add("@userid", SqlDbType.Char, 20).Value = yonghu; //sqlDataAdapterbm2.SelectCommand.Parameters.Add("@workno", SqlDbType.Char, 5).Value = gonghao; sqlDataAdapterbm2.Fill(dataSetbm2,"faults2");

string temp2; temp2 = dataSetbm2.Tables["faults2"].Rows[0]["mobile"].ToString().Trim(); string strinsert; strinsert = "insert into send(smid,userid,scontent,flag,destaddress)values('62257496',@userid,@scontent,'0',@destaddress)"; SqlCommand cmdinsert = new SqlCommand(strinsert,sqlConnection1); cmdinsert.Parameters.Add("@userid",name.Text.Trim()); cmdinsert.Parameters.Add("@scontent",TextBox2.Text.Trim()); cmdinsert.Parameters.Add("@destaddress",temp2); cmdinsert.Connection.Open(); cmdinsert.ExecuteNonQuery(); cmdinsert.Connection.Close(); }//e if(yonghu=="") {//f //string shouji=dr[2].ToString().Trim(); string strinsert8; strinsert8 = "insert into send(smid,userid,scontent,flag,destaddress)values('62257496',@userid,@scontent,'0',@destaddress)"; SqlCommand cmdinsert8 = new SqlCommand(strinsert8,sqlConnection1); cmdinsert8.Parameters.Add("@userid",name.Text.Trim()); cmdinsert8.Parameters.Add("@scontent",TextBox2.Text.Trim()); cmdinsert8.Parameters.Add("@destaddress",shouji); cmdinsert8.Connection.Open(); cmdinsert8.ExecuteNonQuery(); cmdinsert8.Connection.Close();

}//f }//d }//c

}//b if(strarr[i].Length==11) { if(strarr[i].Substring(0,2)!="13") {

} if(strarr[i].Substring(0,2)=="13") { string strinsert; strinsert = "insert into send(smid,scontent,flag,destaddress)values('62257496',@scontent,'0',@destaddress)"; SqlCommand cmdinsert = new SqlCommand(strinsert,sqlConnection1); cmdinsert.Parameters.Add("@scontent",TextBox2.Text.Trim()); cmdinsert.Parameters.Add("@destaddress",strarr[i].Trim()); cmdinsert.Connection.Open(); cmdinsert.ExecuteNonQuery(); cmdinsert.Connection.Close(); } } }//a TextBox1.Text = ""; TextBox2.Text = ""; Response.Write ("<script language='javascript'>alert('发送成功！')</script>");

} } 帮忙改