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cannot convert to string 2

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CRuser89

CRuser89

Programmer
May 18, 2005
79
US
Hello everyone,

I am using VS2005 (C#) and have the following code behind for my login page. When I try to compile it, I get the following error on the line in bold below. Seems like I need to convert "UserName" and "Password" to strings. Can someone please help me with this?

Thanks,
Kathy

error
Argument'1': cannot convert from 'System.Web.UI.WebControls.TextBox' to 'string'




code behind
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Web.Security;
using System.Data.SqlClient;
using System.Configuration;
using LoginInfoTableAdapters;


namespace LoginTest
{

public partial class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.TextBox UserName;
protected System.Web.UI.WebControls.RequiredFieldValidator rvUserValidator;
protected System.Web.UI.WebControls.TextBox Password;
protected System.Web.UI.WebControls.RequiredFieldValidator rvPasswordValidator;
protected System.Web.UI.WebControls.Button cmdSubmit;
protected System.Web.UI.WebControls.ValidationSummary Validationsummary1;
protected System.Web.UI.WebControls.Label lblMessage;
protected System.Web.UI.WebControls.Label lblMessage2;

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

}

protected void cmdSubmit_Click(object sender, System.EventArgs e)
{
if (Page.IsValid)
{
tblPeopleTableAdapter LoginAdapter = new tblPeopleTableAdapter();

LoginInfo.tblPeopleDataTable Criteria =
LoginAdapter.GetDataBy(UserName, Password);
this.GridView1.DataSource = Accounts;
this.GridView1.DataBind();

}

}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{

}
}
}

 
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The GetDataBy is something yours, specified in the adapter... i think. You need to pass the texts of the textboxes:

LoginInfo.tblPeopleDataTable Criteria = LoginAdapter.GetDataBy(UserName.Text, Password.Text);

I am not sure if it works. Try also (for both controls. I show you for one):

- this.UserName.Text
- ((TextBox)this.FindControl("UserName")).Text


Hope this helps
 
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Thank you tipgiver for your tips. I tried passing the texts of the textboxes but that still didn't work. I'm getting the error - "Object reference not set to an instance of an object".

I am very new to .net and didn't understand how to try out your second tip.

Thanks again,
Kathy
 
Upvote 0 Downvote
Firstly, you need to pass the Text property of the TextBox in order to get it's value in a String format. Secondly, it depends where your TextBox is located. You will have to paste the HTML portion of your page in order for us to help you with this.


____________________________________________________________

Need help finding an answer?

Try the Search Facility or read FAQ222-2244 on how to get better results.

 
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Tipgiver - .GetDataBy is a method that was created through the TableAdapter Query Configuration Wizard. I created a query to pull all records of the people table based on the Username and Password parameters provided. When I plug in actual fields like "abc", "password" (these are actual records in the people table, then it works fine. But it doesn't like it when I pass the parameters.

ca8msm - I have included the login.aspx code below. Thank you both for your assistance.

login.aspx

<%@ Page language="C#" CodeFile="Login.aspx.cs" AutoEventWireup="false" Inherits="LoginTest.WebForm1"%>

<html xmlns=" <head>
<title>WebForm1</title>
<link href="../StyleSheet.css" type="text/css" rel="stylesheet" />
</head>
<body>

<form id="frmlogin" method="post" runat="server">
<asp:Login ID="Login1" align="center" runat="server" Width="247px">
<LayoutTemplate>
<table width="100%">
<tr>
<td class="header1" align="right" style="width: 90px">
<asp:Label ID="UserNameLabel" runat="server" AssociatedControlID="UserName" Font-Bold="False">UserName:</asp:Label>
</td>
<td style="width: 146px" align="right">
<asp:TextBox ID="UserName" runat="server" Width="121px"></asp:TextBox>
<asp:RequiredFieldValidator ID="UserNameRequired" runat="server" ControlToValidate="UserName" ErrorMessage="UserName is required." ToolTip="Password is required." ValidationGroup="Login1" Width="14px">*</asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td class="header1"align="right" style="width: 90px">
<asp:Label ID="PasswordLabel" runat="server" AssociatedControlID="Password" Font-Bold="False">Password:</asp:Label>
</td>
<td style="width: 146px" align="right">
<asp:TextBox ID="Password" runat="server" TextMode="Password" Width="121px"></asp:TextBox>
<asp:RequiredFieldValidator ID="PasswordRequired" runat="server" ControlToValidate="Password" ErrorMessage="Password is required." ToolTip="Password is required." ValidationGroup="Login1" Width="14px">*</asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td align="center" colspan="2" style="color: red; height: 11px;">
<asp:Literal ID="FailureText" runat="server" EnableViewState="False"></asp:Literal>
</td>
</tr>
<tr>
<td align="center" colspan="2">
<asp:Button ID="cmdSubmit" runat="server" Text="Log In" ValidationGroup="Login1" Font-Bold="False" ForeColor="Black" OnClick="cmdSubmit_Click"/>
</td>
</tr>
<tr>
<td class="text2" align="center" colspan="2" >
<asp:HyperLink ID="HyperLink1" runat="server" ForeColor="Black" NavigateUrl="~/Recover.aspx" EnableTheming="True">Request Account</asp:HyperLink>
</td>
</tr>
</table>
<tr class="Err2" valign="top" style="height: 25px" >
<td align="center" colspan="2">
<asp:ValidationSummary ID="ValidationSummary1" align="center" runat="server" ValidationGroup="Login1" DisplayMode="List" />

</td>
</tr>
</LayoutTemplate>
</asp:Login>
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
</form>
</body>
</html>
 
Upvote 0 Downvote
OK, as for my second point, in order to get a reference to the TextBox, you need to use the parent container's FindControl method and then convert it to a TextBox. Something like this:
Code: 
Ctype(Login1.FindControl("UserName), TextBox).Text


____________________________________________________________

Need help finding an answer?

Try the Search Facility or read FAQ222-2244 on how to get better results.

 
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In C#: ((TextBox)Login1.FindControl("UserName")).Text();
 
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