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How to sort a dataset in ASP.NET C#

I am trying to sort a datatable into a DataSet. I want to sort by the Status Column in "DESC". But I am not aware how to go about this. I have tried the suggested solutions online but I seem not to be doing something right. Here is what I have tried, albeit, I have commented out the sorting lines of the code as they do not work for me. How can I sort my table using the Status column in Desc?
[WebMethod(EnableSession = true)]
public List < TaskListClass > getTasks() {
var userId = Session["UserId"].ToString();
List < TaskListClass > objB = new List < TaskListClass > ();
try {
using(var connection = new SqlConnection(ConfigurationManager.ConnectionStrings["DBConnString"].ToString())) {
connection.Open();
DataSet Myds = new DataSet();
// Myds.Tables[0].DefaultView.Sort = "Status desc";
SqlDataAdapter sqldr = new SqlDataAdapter();
string ProcName = "getTasks";
SqlCommand cmd = new SqlCommand(ProcName, connection);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("#userId", SqlDbType.VarChar, 900).Value = userId;
sqldr.SelectCommand = cmd;
sqldr.Fill(Myds);
DataTable dt = Myds.Tables[0];
// DataTable dt = Myds.Tables[0].DefaultView.ToTable();
for (int i = 0; i < dt.Rows.Count; i++) {
objB.Add(new TaskListClass() {
Id = Convert.ToString(dt.Rows[i]["Id"]),
Subject = Convert.ToString(dt.Rows[i]["Subject"]),
Customer = Convert.ToString(dt.Rows[i]["Customer"]),
Sender = Convert.ToString(dt.Rows[i]["Sender"]),
Receiver = Convert.ToString(dt.Rows[i]["Receiver"]),
Priority = Convert.ToString(dt.Rows[i]["Priority"]),
StartDate = Convert.ToString(dt.Rows[i]["StartDate"]),
EndDate = Convert.ToString(dt.Rows[i]["EndDate"]),
Status = Convert.ToString(dt.Rows[i]["Status"]),
OnProgress = Convert.ToString(dt.Rows[i]["OnProgress"]),
});
}
}
} catch (Exception e) {
msg = e.ToString();
}
return objB;
}

Ok, a few things.
first up, a dataset is a collection of tables - "many tables" possible.
But you have ONE table, so why use a dataset? I see no need. Just use a single data table for this.
And this will reduce the code.
So, I suggest this, or close to this:
using (var connection = new SqlConnection(ConfigurationManager.ConnectionStrings["DBConnString"].ToString()))
{
using (var cmd = new SqlCommand("getTasks", connection))
{
connection.Open();
cmd.CommandType = CommandType.StoredProcedure;
DataTable dt = new DataTable();
cmd.Parameters.Add("#userId", SqlDbType.VarChar).Value = userId;
dt.Load(cmd.ExecuteReader());
// now sort the datatable
dt.DefaultView.Sort = "Status DESC";
// now fill out our object with each row
foreach (DataRow OneRow in dt.Rows)
{
objB.Add(new TaskListClass()
{
Id = OneRow["Id"].ToString(),
Subject = OneRow["Subject"].ToString(),
Customer = OneRow["Customer"].ToString(),
Sender = OneRow["Sender"].ToString(),
Receiver = OneRow["Receiver"].ToString(),
Priority = OneRow["Priority"].ToString(),
StartDate = OneRow["StartDate"].ToString(),
EndDate = OneRow["EndDate"].ToString(),
Status = OneRow["Status"].ToString(),
OnProgress = OneRow["OnProgress"].ToString(),
}); ;
}
}
}
}
return objB;

The way the current code is written, you could add this after the for-loop:
objB = objB.OrderByDescending(t => t.Status).ToList();
Depending of the datatype of Status, it might be sorted alphabetically.

var dataRow = dt.AsEnumerable().OrderByDescending(x => x.Field<string>("Status")).ToList();
foreach (var item in dataRow)
{
//Enter your Code Here
}
Here dt is your datatable.
dataRow is a set of list.
After get the data list, you can asign it to your "objB".

How to get excel rows one by one in command text using loop?oledb,c#

I am using oledb to read excel file and then i am trying to apply some conditions and then save in db, but i just want to read excel row one by one using loop.
var cmd = conn.CreateCommand();
cmd.CommandText = "select * from [الحيازات$]";// want to get this rows using loop so
//that only specific row is selected perform opertion blow then i will save in db,but
//its selecting all rows now
using (var rdr = cmd.ExecuteReader())
{
//LINQ query - when executed will create anonymous objects for each row
var query = (from DbDataRecord row in rdr
select row)
.Select(x =>
{
//dynamic item = new ExpandoObject();
Dictionary<string, string> item = new Dictionary<string, string>();
for (int i = 0; i < x.FieldCount; i++)
{
//code
}
});
}

Please check this
private void ReadExcel()
{
try
{
string connectionString = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + #";Extended Properties=""Excel 12.0;HDR=YES;IMEX=1;""";
using (OleDbConnection connection = new OleDbConnection())
{
connection.ConnectionString = connectionString;
using (OleDbCommand command = connection.CreateCommand())
{
command.CommandText = "SELECT * FROM [Sheet1$]";
connection.Open();
OleDbDataAdapter dataAdapter = new OleDbDataAdapter(command);
DataSet dataSet = new DataSet();
dataAdapter.Fill(dataSet);
if (dataSet != null && dataSet.Tables[0] != null)
{
foreach (DataRow row in dataSet.Tables[0].Rows)
{
string value = row["EmailColumnName"].ToString();
}
}
}
}
}
catch (Exception ex)
{
//Handle Exception
}
}

Get the Row values from a excel based on the column Value

I am trying to a get the Row values from a excel sheet, based on the column Value.
e.g. I have CutsomerID as lets say 5 , so I want First name 5, last Name 5 and Address 5
I am converting whole excel sheet into DataTable and then trying to read on each DataRow, when I get CustomerID as 5, I copy all the values and break from the loop
Here is my code and it is working fine as well, but I was wondering is there any way to optimise it.
Here is my Code.
public ExcelData GetDataByCustomerID(String excelFilePath, String customerID)
{
OleDbConnectionStringBuilder connectionStringBuilder = new OleDbConnectionStringBuilder();
connectionStringBuilder.Provider = "Microsoft.ACE.OLEDB.12.0";
connectionStringBuilder.DataSource = excelFilePath;
connectionStringBuilder.Add("Mode", "Read");
const string extendedProperties = "Excel 12.0;IMEX=1;HDR=YES";
connectionStringBuilder.Add("Extended Properties", extendedProperties);
String connectionString = connectionStringBuilder.ToString();
// Create connection object by using the preceding connection string.
using( var objConn = new OleDbConnection(connectionString))
{
objConn.Open();
// Get the data table contaning the schema guid.
DataTable excelSheetsDataTable = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if (excelSheetsDataTable == null)
return null;
// get all the tables in the Sheet
List<String> excelSheets = (from DataRow row in excelSheetsDataTable.Rows select row["TABLE_NAME"].ToString()).ToList();
// Our data is on First sheet only
OleDbCommand _oleCmdSelect = new OleDbCommand(#"SELECT * FROM [" + excelSheets[0] + "]", objConn);
OleDbDataAdapter oleAdapter = new OleDbDataAdapter();
oleAdapter.SelectCommand = _oleCmdSelect;
DataTable newDataTable = new DataTable();
oleAdapter.FillSchema(newDataTable, SchemaType.Source);
oleAdapter.Fill(newDataTable);
if (newDataTable.Columns.Contains("CustomerID"))
{
foreach (DataRow rowValue in newTB.Rows)
{
if ((string) rowValue["CustomerID"] == customerID)
{
var data = new ExcelData
{
customerFirstName = rowValue["Customer_First_ Name"].ToString(),
customerLastName = rowValue["Customer_Last_Name"].ToString(),
customerAddress = rowValue["Customer_Address"].ToString(),
};
return data;
}
}
String message = String.Format("The CustomerID {0} not found in Excel file {1}", customerID, excelFilePath);
MessageBox.Show(message);
}
else
{
String message = String.Format("The Column CustomerID not found in Excel file {0}", excelFilePath);
MessageBox.Show(message);
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
return null;
}
public class ExcelData
{
public String customerID;
public String customerFirstName;
public String customerLastName;
public String customerAddress;
}

Change your select query to like below -
#"SELECT * FROM [" + excelSheets[0] + "] WHERE CustomerID=<your_value>"

Courtesy msdn web site:
Link: MSDN
DataTable dt;
private void button1_Click(object sender, EventArgs e)
{
try
{
openFileDialog1.ShowDialog();
string connectionString = string.Format("Provider = Microsoft.Jet.OLEDB.4.0;Data Source ={0};Extended Properties = Excel 8.0;", this.openFileDialog1.FileName);
var con = new OleDbConnection(connectionString);
var cmd = new OleDbCommand("select * from [sheet1$] where [MRN#]=#c", con);
cmd.Parameters.Add("#c", "33264");
con.Open();
var dr = cmd.ExecuteReader();
if (dr.HasRows)
{
dt = new DataTable();
dt.Load(dr);
}
dr.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
DataGridView dv = new DataGridView();
this.Controls.Add(dv);
dv.DataSource = dt;
}
}
EDIT:
As per your code you should try the below lines of code:
OleDbCommand _oleCmdSelect = new OleDbCommand(#"SELECT * FROM [" + excelSheets[0] + "]" + " Where [CustomerID#] = #custID" , objConn);
_oleCmdSelect.Parameters.Add("#custID", customerID);
OleDbDataAdapter oleAdapter = new OleDbDataAdapter();
oleAdapter.SelectCommand = _oleCmdSelect;

C# from db to treeview menu creation

I aim to create treeview menu with using dt ,ds and geting data from DB tables. My code like down below. Got error at Ds I mark it inside code you can see.. it gives an error " Incorrect Systax near 'İşlemleri' " , İşlemleri is part of value that tnParent.Text contains. ( Gişe İşlemleri)
void fill_Tree2()
{
DataSet PrSet = PDataset("select * from mnu_tbl_mnuElmnlr");
treeView1.Nodes.Clear();
foreach (DataRow dr in PrSet.Tables[0].Rows)
{
TreeNode tnParent = new TreeNode();
tnParent.Text = dr["MenuAdi"].ToString(); /////////////////// 'Gişe İşlemleri'
tnParent.Tag = dr["id"].ToString();
tnParent.Expand();
treeView1.Nodes.Add(tnParent);
FillChild(tnParent, tnParent.Text);
}
}
public void FillChild(TreeNode parent, string ParentId)
{
DataSet ds = PDataset("Select altMenuAdi from mnu_tbl_AltElmnlr where ustMenuId = (select id from mnu_tbl_mnuElmnlr));
parent.Nodes.Clear();
foreach (DataRow dr in ds.Tables[0].Rows)
{
TreeNode child = new TreeNode();
child.Text = dr["altMenuAdi"].ToString();
// child.Tag = dr["ChildId"].ToString().Trim();
parent.Nodes.Add(child);
}
}
protected DataSet PDataset(string Select_Statement)
{
SqlConnection conn = new SqlConnection();
// conn.ConnectionString = ConfigurationManager.ConnectionStrings["1123"].ConnectionString;
SqlConnection SqlCon = new SqlConnection("server=123;Database=123;Trusted_Connection=True;");
SqlDataAdapter ad = new SqlDataAdapter(Select_Statement, SqlCon);
DataSet ds = new DataSet();
ad.Fill(ds); /////// Here it gives an error " Incorrect Systax near 'İşlemleri' "
return ds;
}

any alternative to xmldatasource in asp.net menu control

my code is as follows
DataSet ds = new DataSet();
string connStr = "Data Source=PARITAS00024;Initial Catalog=MenuDb;Persist Security Info=True;User ID=sa;Password=paritas123";
using (SqlConnection conn = new SqlConnection(connStr))
{
string sql = "Select MenuId, MenuTitle, MenuDesc, MenuURL, ParentMenuId from tblMenus where Status=1 and RecordStatus=1 order by ParentMenuId, DisplayOrder";
SqlDataAdapter da = new SqlDataAdapter(sql, conn);
da.Fill(ds);
da.Dispose();
}
ds.DataSetName = "Menus";
ds.Tables[0].TableName = "Menu";
DataRelation relation = new DataRelation("ParentChild", ds.Tables["Menu"].Columns["MenuId"], ds.Tables["Menu"].Columns["ParentMenuId"], true);
relation.Nested = true;
ds.Relations.Add(relation);
System.Web.UI.WebControls.XmlDataSource xds = new System.Web.UI.WebControls.XmlDataSource();
xds.TransformFile = "~/TransformXSLT.xsl";
xds.XPath = "MenuItems/MenuItem";
xds.Data = ds.GetXml();
xds.ID = "xmlDataSourceMenu";
Menu1.DataSource = xds;
Menu1.DataBind();
is this correct way of using the xmldatasource ?

The advantages of using of data sources are related to declarative programming: move the focus from how work must be done to the results. If you are using a datasource in imperative way, you lose all the advantages.
In that code you are giving your menu some XML data got transforming the XML representation of a DataSet returned by a query through an XSL transformation: do you really need to do all that work?
Why don't populate the menu programmatically?
foreach (DataRow parentItem in ds.Tables[0].Rows)
{
MenuItem item = new MenuItem((string)parentItem["Name"]);
menu.Items.Add(categoryItem);
...
}
or, why don't use the XmlDataSource in the aspx:
<asp:XmlDataSource TransformFile="~/TransformXSLT.xsl" XPath="MenuItems/MenuItem" ID="xmlDataSourceMenu" runat="server" />
and, in code behind:
...
xmlDataSourceMenu.Data = ds.GetXml();
...

try
{
XmlDocument xdoc = new XmlDocument();
SqlConnection cnn = null;
SqlCommand cmd = null;
// connection string from web.config
cnn = new SqlConnection(ConfigurationManager.ConnectionStrings["____"].ConnectionString);
cnn.Open();
// SP must return hierarchy of menu items.
string strUSP = "USP_XMLStoredProcedureName";
cmd = new SqlCommand(strUSP, cnn);
XmlReader reader = cmd.ExecuteXmlReader();
if (reader.Read()) { xdoc.Load(reader); }
// DRAG AND DROP XMLDataSource from toolbox , provide id as "DataSourceXML"
DataSourceXML.Data = xdoc.InnerXml.ToString();
// To avoid root
DataSourceXML.XPath = "/ParentMenu/SubMenu";
// :: Provide XMLDatasource ID to Menucontrol.
// OR
XmlDataSource XDS = new XmlDataSource();
XDS.ID = "XMLDataSourceID";
XDS.Data= xdoc.InnerXml;
// To avoid root
XDS.XPath = "/ParentMenu/SubMenu";
MyMenu.DataSource = XDS;
MyMenu.DataBind();
}
catch (Exception ex)
{
throw ex;
}
finally
{
cmd.Dispose();
cnn.Close();
}