help with using a SQL datasource : ASP.NET 2005

May 9, 2008 04:10pm pdt

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03.27.2008 at 05:34PM PDT, ID: 23276150

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8.7

help with using a SQL datasource

Zones: Programming for ASP.NET, SQL Server 2005, .NET Framework 2.0

Tags: ASP.NET 2005

I have a code behind that needs to use the value that is fetched through SqlDataSource.

Here is the code so far

protected void Page_Load(object sender, System.EventArgs e)
{
Session["username"] = HttpContext.Current.User.Identity.Name;
//Lookup the table and fetch the provider info for the username being passed by the session variable.
try
{
Session["username"] = "tom";
CustomerDALTableAdapters.FetchCustomerInfoTableAdapter objCustomer = new CustomerDALTableAdapters.FetchCustomerInfoTableAdapter();

if ((objCustomer.FetchProviderInfo(Session["username"]) == 9999))
{
HyperLink1.NavigateUrl = "http://www.yahoo.com";
}
else
{
HyperLink1.NavigateUrl = "http://www.google.com";
}
}
catch (Exception ex)
{
}
}

You see that the line CustomerDALTableAdapters.FetchCustomerInfoTableAdapter objCustomer = new CustomerDALTableAdapters.FetchCustomerInfoTableAdapter();
uses the strongly typed dataset invoking process. I wish it take the value from the sqldatasource.

Thanks

         
           
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             My web form source is
 
<form id="form1" runat="server">
    
 
    <asp:HyperLink ID="HyperLink1" runat="server" 
        NavigateUrl="#">HyperLink</asp:HyperLink>
        
    
    <br />
    <br />
    
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
        ConnectionString="<%$ ConnectionStrings:ChargesConnectionString %>"         
        SelectCommand="SELECT  [Provider] FROM [Customers] WHERE ([Username] = @Username)" 
        
        ProviderName="<%$ ConnectionStrings:ChargesConnectionString.ProviderName %>">
        <SelectParameters>
            <asp:SessionParameter Name="Username" SessionField="username" Type="String" />
        </SelectParameters>        
    </asp:SqlDataSource>
    
    </form>

           
         

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Question Stats

Zone: Programming

Question Asked By: TECH_NET

Solution Provided By: l-cm

Participating Experts: 1

Solution Grade: A

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03.27.2008 at 06:11PM PDT, ID: 21227207

Rank: Master

l-cm:

Try this.

         
           
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             protected void Page_Load(object sender, System.EventArgs e)
    {
        Session["username"] = HttpContext.Current.User.Identity.Name;
        //Lookup the table and fetch the provider info for the username being passed by the session variable.
        try
        {
            Session["username"] = "tom";
DataView dv = (DataView)SqlDataSource1.Select(DataSourceSelectArguments.Empty);
        int providerInfo = (int)dv.Table.Rows[0][0];
        if (providerInfo == 9999)
        {
            HyperLink1.NavigateUrl = "http://www.yahoo.com";
        }
        else
        {
            HyperLink1.NavigateUrl = "http://www.google.com";
        }
  }
        catch (Exception ex)
        {
        }
    }

           
         

Open in New Window

03.27.2008 at 07:48PM PDT, ID: 21227654

TECH_NET:

When i compile my file, i get the following error
Compiler Error Message: CS0115: 'ASP.option10df_home_aspx.GetTypeHashCode()': no suitable method found to override

Any ideas!!

03.27.2008 at 08:09PM PDT, ID: 21227721

Rank: Master

l-cm:

I don't get an error when I compile using the code I provided you. What line does this error in your code?

03.27.2008 at 08:30PM PDT, ID: 21227806

TECH_NET:

I get the error while debugging itself. The line number is 473

Error 1 'ASP.home_aspx.GetTypeHashCode()': no suitable method found to override c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\certifications\73df1ba5\5731156b\App_Web_df2fzpwc.0.cs 473

03.27.2008 at 08:47PM PDT, ID: 21227881

Rank: Master

l-cm:

Can you post your code? I don't know what is on your line 473. If you double click the error it should take you to the location of the error in the code and I would need to see what is going on in your code.

03.27.2008 at 08:47PM PDT, ID: 21227885

TECH_NET:

i found the issue, there was a typo with the declaration,

public partial class Home : System.Web.UI.Page

now i am able to compile successfully,
but the line
DataView dv = (DataView)SqlDataSource1.Select(DataSourceSelectArguments.Empty);
int providerInfo = (int)dv.Table.Rows[0][0];

is returnning null values even though there is one record that matches the criteria. (ie column name value for username is tom.

This is the exception i get [System.InvalidCastException] = {"Specified cast is not valid."}

03.27.2008 at 08:53PM PDT, ID: 21227906

Rank: Master

l-cm:

Is the data you're returning from the sql query an int or a string? If it's returning a string then use...

string providerInfo = (string)dv.Table.Rows[0][0];
if (providerInfo == "9999")
...

Accepted Solution

03.27.2008 at 09:01PM PDT, ID: 21227939

TECH_NET:

it is a decimal(6,0)

03.27.2008 at 09:04PM PDT, ID: 21227944

Rank: Master

l-cm:

Then use this.

decimal providerInfo = (decimal)dv.Table.Rows[0][0];
if (providerInfo == 9999)

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