I have a function where any type of list<>
can be passed into. The function then determines which type the list is. My problem is that Im passing in a list then I convert it but afterwards when I assign my list to the passed in list I get an error:
Cannot convert type 'System.Collection.Generic.List<ADMPortal_2.Modles.ProductionPending>' to 'System.Collections.List<T>
CODE
Database call which returns the results in a datatable which is then to be converted to its list type. This function must be able to return any type of list e.g. List, List etc.
string cnnStr = ConfigurationManager.ConnectionStrings["conChdbd1"].ConnectionString;
OracleConnection cnn;
OracleDataReader dr;
public List<T> Execute<T>(string strSql, List<T> list)
{
using (OracleConnection conn = new OracleConnection(cnnStr))
{
using (OracleCommand objCommand = new OracleCommand(strSql, conn))
{
objCommand.CommandType = CommandType.Text;
DataTable dt = new DataTable();
OracleDataAdapter adp = new OracleDataAdapter(objCommand);
conn.Open();
adp.Fill(dt);
if (dt != null)
{
list = ConvertToList(dt, list).ToList();
}
}
}
return list;
}
Here the error happens when assigning to list
public List<T> ConvertToList<T>(DataTable dt, List<T> list)
{
if (list.GetType() == typeof(List<ProductionPending>))
{
list = ConvertToProductionPending(dt, (list as List<ProductionPending>));
}
else if (list.GetType() == typeof(List<ProductionRecent>))
{
list = ConvertToProductionRecent(dt, (list as List<ProductionRecent>));
}
else if (list.GetType() == typeof(List<MirrorDeployments>))
{
list = ConvertToMirror(dt, (list as List<MirrorDeployments>));
}
return list;
}
Here the convert functions
private List<ProductionPending> ConvertToProductionPending(DataTable dt, List<ProductionPending> list)
{
// Convert here
return list;
}
private List<ProductionRecent> ConvertToProductionRecent(DataTable dt, List<ProductionRecent> list)
{
// Convert here
return list;
}
private List<MirrorDeployments> ConvertToMirror(DataTable dt, List<MirrorDeployments> list)
{
// Convert here
return list;
}
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