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Misty View Drop Down
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    Posted: 08 August 2005 at 1:18pm

I'd like to retrieve the field ("Month_Year") from the database below so I can use it as a heading above the datagrid. Please look at the bolded parts of my code below.

Here's my code:

<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Page Language="C#" Debug="true" %>


 <script language=C# runat=server>

string strConnect;
SqlConnection conPayment;
SqlCommand cmdSql;
string strSql;
string strMonthID; 
string MonthName;

void Page_Load()
{
 strConnect = ConfigurationSettings.AppSettings["ConnectionString"];
 conPayment = new SqlConnection(strConnect);
 if (!(IsPostBack)) {
    BindDataGrid();
 }
}

void BindDataGrid()
{

//Get incoming Month ID
strMonthID = Request.QueryString["ID"]; 

 //Start Sql statement
         strSql = "Select * From MonthInfo, Amounts, Clients";
      strSql = strSql + " where MonthInfo.MonthID = Amounts.MonthID";
         strSql = strSql + " and Amounts.ClientID = Clients.ClientID";
         strSql = strSql + " and UserName = '" + Session["UserName"] + "'";
      strSql = strSql + " and MonthInfo.MonthID = '" + strMonthID + "'";  
      strSql = strSql + " Order By AmountID";
     
                &nbs p;   
 
cmdSql = new SqlCommand(strSql, conPayment);   
conPayment.Open();
 
 
 SqlDataReader reader = cmdSql.ExecuteReader();

if (reader.HasRows) {
   dtrPayment.Visible = true;
   dtrPayment.DataSource = reader;
   dtrPayment.DataBind(); 
  
I'd like to add the code for retrieving information  from Month_Year. Look at the code that I commented out below. It didn't work.

  //MonthName = dtrPayment.Tables[0].Rows[0].Item["Month_Year"]; 
  
   //Display Month Name
   //lblMonthName.Text = "Payments For " & Month_Year; 
  
}
else
  
     dtrPayment.Visible = false;
  

//don't forget to close the reader !!!
//reader.Close();
conPayment.Close();
}

</Script>

<html>
<head><title>Amounts</title></head>
<body>


<form Runat="Server">

<asp:DataGrid
  ID="dtrPayment"
  DataKeyField="AmountID"
  AutoGenerateColumns="False"
  CellPadding="10"
  HeaderStyle-BackColor="tan"
  Runat="Server">
<Columns>

  <asp:BoundColumn
    HeaderText="Service"
    DataField="Service" />

  <asp:BoundColumn
    HeaderText="Payment Method"
    DataField="PaymentMethod" />
   
   <asp:BoundColumn
    HeaderText="Payment Owed"
    DataField="PaymentOwed"
    DataFormatString="{0:C}"/>
   
    <asp:BoundColumn
    HeaderText="Paid Date"
    DataField="PaidDate"
    DataFormatString="{0:MM/dd/yyyy}"/>  

 
</Columns>
</asp:DataGrid>

</form>
</body>
</html>
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Mart View Drop Down
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Points: 2304 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mart Quote  Post ReplyReply Direct Link To This Post Posted: 08 August 2005 at 4:14pm
MonthName = dtrPayment["Month_Year"] as string; 
//Display Month Name
lblMonthName.Text = "Payments For " & Month_Year; 
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Misty View Drop Down
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Points: 711 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Misty Quote  Post ReplyReply Direct Link To This Post Posted: 08 August 2005 at 4:47pm
Unfortunately, that didn't work. I got the following error message: Compiler Error Message: CS0021: Cannot apply indexing with [] to an expression of type 'System.Web.UI.WebControls.DataGrid'

Source Error:

Line 51:    
Line 52: 
Line 53:    MonthName = dtrPayment["Month_Year"] as string;
Line 54:   
Line 55:   //Display Month Name
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Mart View Drop Down
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Points: 2304 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mart Quote  Post ReplyReply Direct Link To This Post Posted: 08 August 2005 at 5:03pm
oh, try

reader["Month_Year"] as string;

and you commented out the line where you close the reader, even though before that you wrote "Don't forget to close the reader!!" lol
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Misty View Drop Down
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Points: 711 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Misty Quote  Post ReplyReply Direct Link To This Post Posted: 08 August 2005 at 10:54pm
I commented out the line of code that closed the reader because it caused an error message before.
I am getting another error message that I don't understand. I tested the sql query in Query Analyzer and I got the records fine. Here's the error message:
Exception Details: System.InvalidOperationException: Invalid attempt to read when no data is present.

Source Error: 

Line 51:    //MonthName = dtrPayment.Tables[0].Rows[0].Item["Month_Year"]; 
Line 52: 
Line 53:    MonthName = reader["Month_Year"] as string;
 
Here's my modified code:
 
 //Start Sql statement
         strSql = "Select * From MonthInfo, Amounts, Clients";
      strSql = strSql + " where MonthInfo.MonthID = Amounts.MonthID";
         strSql = strSql + " and Amounts.ClientID = Clients.ClientID";
         strSql = strSql + " and UserName = '" + Session["UserName"] + "'";
      strSql = strSql + " and MonthInfo.MonthID = '" + strMonthID + "'";  
      strSql = strSql + " Order By AmountID";
     
                &nbs p;   
 
cmdSql = new SqlCommand(strSql, conPayment);   
conPayment.Open();
 
 
 SqlDataReader reader = cmdSql.ExecuteReader();
if (reader.HasRows) {
   dtrPayment.Visible = true;
   dtrPayment.DataSource = reader;
   dtrPayment.DataBind();
  
   MonthName = reader["Month_Year"] as string;
 
  //Display Month Name
  lblMonthName.Text = "Payments For " + MonthName; 
 
}
else
  
     dtrPayment.Visible = false;
  
//don't forget to close the reader !!!
reader.Close();
conPayment.Close();
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Leeb65 View Drop Down
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Points: 62 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Leeb65 Quote  Post ReplyReply Direct Link To This Post Posted: 09 August 2005 at 2:40am
Quote MonthName = dtrPayment["Month_Year"] as string; 
//Display Month Name
lblMonthName.Text = "Payments For " & Month_Year; 
 
The answer sort of hits you in the face
 
MonthName = dtrPayment["Month_Year"] as string; 
//Display Month Name
lblMonthName.Text = "Payments For " + MonthName; 
 
you must display the variable you set not the column name.


Edited by Leeb65 - 09 August 2005 at 2:40am
Lee


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Mart View Drop Down
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Joined: 30 November 2002
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Points: 2304 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mart Quote  Post ReplyReply Direct Link To This Post Posted: 09 August 2005 at 4:24am
That wouldn't explain the ADO error though. Try changing reader.HasRows to reader.Read().
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Misty View Drop Down
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Joined: 06 February 2002
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Points: 711 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Misty Quote  Post ReplyReply Direct Link To This Post Posted: 09 August 2005 at 1:20pm
I'm still getting the error message after changing it to reader.Read(). I am not sure what is wrong. Maybe there's a typo somewhere. The SQL Query works fine.
 
Here's my modified code:
 
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Page Language="C#" Debug="true" %>

 <script language=C# runat=server>
string strConnect;
SqlConnection conPayment;
SqlCommand cmdSql;
string strSql;
string strMonthID; 
string MonthName;
void Page_Load()
{
 strConnect = ConfigurationSettings.AppSettings["ConnectionString"];
 conPayment = new SqlConnection(strConnect);
 if (!(IsPostBack)) {
    BindDataGrid();
 }
}
void BindDataGrid()
{
//Get incoming Month ID
strMonthID = Request.QueryString["ID"]; 
 //Start Sql statement
         strSql = "Select * From MonthInfo, Amounts, Clients";
      strSql = strSql + " where MonthInfo.MonthID = Amounts.MonthID";
         strSql = strSql + " and Amounts.ClientID = Clients.ClientID";
         strSql = strSql + " and UserName = '" + Session["UserName"] + "'";
      strSql = strSql + " and MonthInfo.MonthID = '" + strMonthID + "'";  
      strSql = strSql + " Order By AmountID";
     
                &nbs p;   
 
cmdSql = new SqlCommand(strSql, conPayment);   
conPayment.Open();
 
 
 SqlDataReader reader = cmdSql.ExecuteReader();
if (reader.Read()) {
   dtrPayment.Visible = true;
   dtrPayment.DataSource = reader;
   dtrPayment.DataBind();
  
   MonthName = reader["Month_Year"] as string;
 
  //Display Month Name
  lblMonthName.Text = "Payments For " + MonthName; 
  
}
else
  
     dtrPayment.Visible = false;
  
//don't forget to close the reader !!!
reader.Close();
conPayment.Close();
}
</Script>
<html>
<head><title>Amounts</title></head>
<body>
<h1><asp:Label id="lblMonthName" runat="server"/> </h1>
<form Runat="Server">
<asp:DataGrid
  ID="dtrPayment"
  DataKeyField="AmountID"
  AutoGenerateColumns="False"
  CellPadding="10"
  HeaderStyle-BackColor="tan"
  Runat="Server">
<Columns>
  <asp:BoundColumn
    HeaderText="Service"
    DataField="Service" />
  <asp:BoundColumn
    HeaderText="Payment Method"
    DataField="PaymentMethod" />
   
   <asp:BoundColumn
    HeaderText="Payment Owed"
    DataField="PaymentOwed"
    DataFormatString="{0:C}"/>
   
    <asp:BoundColumn
    HeaderText="Paid Date"
    DataField="PaidDate"
    DataFormatString="{0:MM/dd/yyyy}"/>  
 
</Columns>
</asp:DataGrid>
</form>
</body>
</html>
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