CODEWITHSUNDEEP
c#asp.netfile-io
zkanoca
zkanoca

Reputation: 9928

Adding folder list to Dropdown list

When I call the following method as a datasource of a dropdownlist, I get System.Data.DataRowView instead of folder names. Where am I doing wrong? 

public DataTable listFolders()
{
    DataTable dt = new DataTable();
    dt.Columns.Add("name", typeof(string));
    dt.Columns.Add("fullname", typeof(string));

    string defaultPath = Server.MapPath(ConfigurationManager.AppSettings["defaultPath"].ToString());

    foreach (var dir in new DirectoryInfo(defaultPath).GetDirectories("*", SearchOption.TopDirectoryOnly))
    {
        dr = dt.NewRow();
        dr["name"] = dir.Name;
        dr["fullname"] = dir.FullName;
        dt.Rows.Add(dr);
    }
    return dt; 
}

My method call

ddl.DataSource = listFolders();
ddl.DataBind();

Upvotes: 0

Views: 125

Answers (1)

Tim Schmelter
Tim Schmelter

Reputation: 460208

You have to specify the DataTextField and DataValueField:

ddl.DataSource = listFolders();
ddl.DataTextField  = "name";     // or fullname
ddl.DataValueField = "fullname"; // or name
ddl.DataBind();

Otherwise .NET doesn't know which field you want to show and which you want to use as key. You can also use only one of both, then the text is also the value and vice-versa. But you cannot omit it, otherwise object.ToString() is used which is the full-typename in case of a DataRowView.

Upvotes: 1

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