} // GetAssemblyQualifiedNoVersionName
private static async System.Threading.Tasks.Task WriteColumnDefinition(
System.Xml.XmlWriter writer
, System.Data.IDataReader dr
, XmlRenderType_t renderType)
{
await writer.WriteStartElementAsync(null, "columns", null);
for (int i = 0; i <= dr.FieldCount - 1; i++)
{
await writer.WriteStartElementAsync(null, "column", null);
await writer.WriteAttributeStringAsync(null, "name", null, dr.GetName(i));
await writer.WriteAttributeStringAsync(null, "index", null, i.ToString(System.Globalization.CultureInfo.InvariantCulture));
if (renderType.HasFlag(XmlRenderType_t.WithDetail))
{
await writer.WriteAttributeStringAsync(null, "fieldType", null, GetTypeName(dr.GetFieldType(i), renderType));
}
await writer.WriteEndElementAsync(); // column
}
await writer.WriteEndElementAsync(); // columns
} // WriteColumnDefinition
} // GetAssemblyQualifiedNoVersionName
private static string GetTypeName(System.Type type, XmlRenderType_t renderType)
{
if (type == null)
{
return(null);
}
if (renderType.HasFlag(XmlRenderType_t.AssemblyQualifiedName))
{
return(GetAssemblyQualifiedNoVersionName(type));
}
if (renderType.HasFlag(XmlRenderType_t.LongName))
{
return(type.FullName);
}
return(type.Name);
} // GetAssemblyQualifiedNoVersionName
private static System.Xml.XmlWriter CreateXmlWriter(System.Text.StringBuilder builder, System.IO.TextWriter writer, System.Text.Encoding encoding, XmlRenderType_t renderType)
{
System.Xml.XmlWriterSettings xs = new System.Xml.XmlWriterSettings();
if (renderType.HasFlag(XmlRenderType_t.Indented))
{
xs.Indent = true;
}
else
{
xs.Indent = false;
}
xs.Async = true;
xs.IndentChars = " ";
xs.NewLineChars = System.Environment.NewLine;
xs.OmitXmlDeclaration = false; // // <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
// xs.Encoding = System.Text.Encoding.UTF8; // doesn't work with pgsql
// xs.Encoding = new System.Text.UTF8Encoding(false);
xs.Encoding = encoding;
xs.CloseOutput = true;
// string exportFilename = System.IO.Path.Combine(@"d:\", table_name + ".xml");
// using (System.Xml.XmlWriter writer = System.Xml.XmlWriter.Create(exportFilename, xs))
if (writer != null)
{
return(System.Xml.XmlWriter.Create(writer, xs));
}
StringWriterWithEncoding sw = new StringWriterWithEncoding(builder, xs.Encoding);
return(System.Xml.XmlWriter.Create(sw, xs));
} // End Function CreateXmlWriter
private static System.Xml.XmlWriter CreateXmlWriter(Microsoft.AspNetCore.Http.HttpContext context, System.Text.Encoding encoding, XmlRenderType_t renderType)
{
return(CreateXmlWriter(context.Response.Body, encoding, renderType));
}
private static System.Xml.XmlWriter CreateXmlWriter(System.IO.Stream stream, System.Text.Encoding encoding, XmlRenderType_t renderType)
{
System.IO.TextWriter tw = new System.IO.StreamWriter(stream, encoding);
return(CreateXmlWriter(null, tw, encoding, renderType));
}
private static System.Xml.XmlWriter CreateXmlWriter(System.IO.StreamWriter writer, XmlRenderType_t renderType)
{
return(CreateXmlWriter(null, writer, writer.Encoding, renderType));
}
private static System.Xml.XmlWriter CreateXmlWriter(System.Text.StringBuilder builder, System.Text.Encoding encoding, XmlRenderType_t renderType)
{
return(CreateXmlWriter(builder, null, encoding, renderType));
}
} // WriteColumnDefinition
private static async System.Threading.Tasks.Task WriteAsXmlAsync(
string table_schema
, string table_name
, XmlRenderType_t format
, System.Xml.XmlWriter writer
, System.Data.IDataReader dr)
{
await writer.WriteStartDocumentAsync(true);
bool dataAsAttributes = format.HasFlag(XmlRenderType_t.DataInAttributes);
bool dataTableOnly = format.HasFlag(XmlRenderType_t.DataTable);
if (!dataTableOnly)
{
await writer.WriteStartElementAsync(null, "dataset", null);
}
do
{
await writer.WriteStartElementAsync(null, "table", null);
if (dataTableOnly)
{
if (table_schema != null)
{
await writer.WriteAttributeStringAsync(null, "table_schema", null, table_schema);
}
if (table_name != null)
{
await writer.WriteAttributeStringAsync(null, "table_name", null, table_name);
}
}
if (!dataAsAttributes)
{
await writer.WriteAttributeStringAsync("xmlns", "xsi", null, System.Xml.Schema.XmlSchema.InstanceNamespace);
}
int fc = dr.FieldCount;
if (format.HasFlag(XmlRenderType_t.WithColumnDefinition))
{
await WriteColumnDefinition(writer, dr, format);
}
string[] columnNames = new string[fc];
System.Type[] columnTypes = new System.Type[fc];
for (int i = 0; i < dr.FieldCount; ++i)
{
columnNames[i] = dr.GetName(i);
columnTypes[i] = dr.GetFieldType(i);
} // Next i
while (dr.Read())
{
await writer.WriteStartElementAsync(null, "row", null);
for (int i = 0; i < fc; ++i)
{
if (!dataAsAttributes)
{
await writer.WriteStartElementAsync(null, columnNames[i], null);
}
object obj = dr.GetValue(i);
if (obj != System.DBNull.Value)
{
string value = null;
if (object.ReferenceEquals(columnTypes[i], typeof(System.DateTime)))
{
System.DateTime dt = (System.DateTime)obj;
value = dt.ToString("yyyy-MM-dd'T'HH':'mm':'ss'.'fff", System.Globalization.CultureInfo.InvariantCulture);
}
else
{
value = System.Convert.ToString(obj, System.Globalization.CultureInfo.InvariantCulture);
}
if (dataAsAttributes)
{
await writer.WriteAttributeStringAsync(null, columnNames[i], null, value);
}
else
{
writer.WriteValue(value);
}
} // End if (obj != System.DBNull.Value)
else
{
if (!dataAsAttributes)
{
await writer.WriteAttributeStringAsync("xsi", "nil", System.Xml.Schema.XmlSchema.InstanceNamespace, "true");
}
}
if (!dataAsAttributes)
{
await writer.WriteEndElementAsync(); // column
}
} // Next i
await writer.WriteEndElementAsync(); // row
} // Whend
await writer.WriteEndElementAsync(); // table
await writer.FlushAsync();
if (dataTableOnly)
{
break;
}
} while (dr.NextResult());
if (!dataTableOnly)
{
await writer.WriteEndElementAsync(); // dataset
await writer.FlushAsync();
}
} // End Sub WriteAsXmlAsync
public static async System.Threading.Tasks.Task AnyDataReaderToXml(this System.Data.IDbConnection cnn
, string sql
, object param = null
, string tableSchema = null
, string tableName = null
, System.Text.Encoding encoding = null
, XmlRenderType_t format = XmlRenderType_t.Default
, Microsoft.AspNetCore.Http.HttpContext context = null
, System.Data.IDbTransaction transaction = null
, int?commandTimeout = null
, System.Data.CommandType?commandType = null)
{
if (encoding == null)
{
encoding = System.Text.Encoding.UTF8;
}
if (string.IsNullOrEmpty(sql))
{
if (string.IsNullOrEmpty(tableName))
{
throw new System.ArgumentException("Parameter " + nameof(tableName) + " is NULL or empty.");
}
if (string.IsNullOrEmpty(tableSchema))
{
sql = $"SELECT * FROM " + QuoteObject(tableName) + " ;";
}
else
{
sql = $"SELECT * FROM " + QuoteObject(tableSchema) + "." + QuoteObject(tableName) + " ;";
}
} // End if (string.IsNullOrEmpty(sql))
if (string.IsNullOrEmpty(sql))
{
throw new System.ArgumentException("Parameter " + nameof(sql) + " is NULL or empty.");
}
// DynamicParameters dbArgs = new DynamicParameters();
System.Text.StringBuilder xmlBuilder = new System.Text.StringBuilder();
using (System.IO.StreamWriter output =
new System.IO.StreamWriter(context.Response.Body, encoding))
{
// using (System.Xml.XmlWriter writer = CreateXmlWriter(xmlBuilder, format))
using (System.Xml.XmlWriter writer = CreateXmlWriter(output, format))
{
try
{
using (System.Data.Common.DbDataReader dr = await cnn.ExecuteDbReaderAsync(sql, param, transaction, commandTimeout, commandType))
{
if (context != null)
{
context.Response.StatusCode = (int)System.Net.HttpStatusCode.OK;
context.Response.ContentType = "application/xml; charset=" + encoding.WebName;
// context.Response.Headers["Transfer-Encoding"] = "chunked";
} // End if (context != null)
await WriteAsXmlAsync(tableSchema, tableName, format, writer, dr);
} // End Using dr
}
catch (System.Exception ex)
{
context.Response.StatusCode = (int)System.Net.HttpStatusCode.InternalServerError;
context.Response.ContentType = "application/xml; charset=" + encoding.WebName;
bool dataAsAttributes = format.HasFlag(XmlRenderType_t.DataInAttributes);
await writer.WriteStartDocumentAsync(true);
await writer.WriteStartElementAsync(null, "error", null);
if (dataAsAttributes)
{
await writer.WriteAttributeStringAsync(null, "Message", null, ex.Message);
}
else
{
await writer.WriteStartElementAsync(null, "Message", null);
writer.WriteValue(ex.Message);
await writer.WriteEndElementAsync(); // Message
}
if (dataAsAttributes)
{
await writer.WriteAttributeStringAsync(null, "StackTrace", null, ex.StackTrace);
}
else
{
await writer.WriteStartElementAsync(null, "StackTrace", null);
writer.WriteValue(ex.StackTrace);
await writer.WriteEndElementAsync(); // StackTrace
}
await writer.WriteEndElementAsync(); // error
}
await writer.FlushAsync();
await output.FlushAsync();
await context.Response.CompleteAsync();
} // End Using writer
} // Wnd Using output
} // End Task AnyDataReaderToXml
