How to empty an dataset if it is not empty in c#?

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DataTable dtXml = new DataTable("Table1");

                dtXml.Columns.Add("ParamName");
                dtXml.Columns.Add("ParamValue");
                dtXml.Columns.Add("SerialNo");
                dtXml.Columns.Add("ParamDesc");
                dtXml.Columns.Add("ControlType");
                dtXml.Columns.Add("ParamDisplay");
                
                DataSet dsXml = new DataSet();
                dsXml.DataSetName = "NewDataSet";
                if (dtXml.Rows.Count != 0)
                {
                    dtXml.Clear();
                }
                DataRow dr;

                if (UDPColl != null && UDPColl.Count > 0)
                {
                    int CountSlNo = 1;
                    foreach (string items in UDPColl)
                    { 
                        dr = dtXml.NewRow();
                        //dr.ItemArray = items.Split('~');
                        dr["ParamName"] = items.Split(',').Last();
                        dr["ParamValue"] = items.Remove(items.LastIndexOf(',') + 1);
                        dr["SerialNo"] = CountSlNo;
                        dr["ParamDesc"] = "Description";
                        dr["ControlType"] = "D";
                        dr["ParamDisplay"] = items.Split(',').Last();
                        dtXml.Rows.Add(dr);
                        CountSlNo++;
                    }
                    dsXml.Tables.Add(dtXml);

Posted 6-Jan-16 19:43pm

Sathish km

Updated 6-Jan-16 22:36pm

v3

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Comments

deepankarbhatnagar 7-Jan-16 2:00am

Please show your code where you fill this dataset

RelicV 7-Jan-16 2:01am

If you are using dataset which was created from an xml, then clear wont work. It will throw an error.
https://msdn.microsoft.com/en-us/library/system.data.dataset.clear%28v=vs.110%29.aspx

Maciej Los 7-Jan-16 2:49am

What you mean "it not clear the dataset"?

Sathish km 7-Jan-16 4:35am

this is my code...

DataTable dtXml = new DataTable("Table1");

dtXml.Columns.Add("ParamName");
dtXml.Columns.Add("ParamValue");
dtXml.Columns.Add("SerialNo");
dtXml.Columns.Add("ParamDesc");
dtXml.Columns.Add("ControlType");
dtXml.Columns.Add("ParamDisplay");

DataSet dsXml = new DataSet();
dsXml.DataSetName = "NewDataSet";
if (dtXml.Rows.Count != 0)
{
dtXml.Clear();
}
DataRow dr;

if (UDPColl != null && UDPColl.Count > 0)
{
int CountSlNo = 1;
foreach (string items in UDPColl)
{
dr = dtXml.NewRow();
//dr.ItemArray = items.Split('~');
dr["ParamName"] = items.Split(',').Last();
dr["ParamValue"] = items.Remove(items.LastIndexOf(',') + 1);
dr["SerialNo"] = CountSlNo;
dr["ParamDesc"] = "Description";
dr["ControlType"] = "D";
dr["ParamDisplay"] = items.Split(',').Last();
dtXml.Rows.Add(dr);
CountSlNo++;
}
dsXml.Tables.Add(dtXml);

Maciej Los 7-Jan-16 4:42am

Please, see my answer (solution 2).

2 solutions

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deepankarbhatnagar · Answer 1 · 2016-01-06T20:01:00

Solution 1

Please see this link how to delete/clear all the data from dataset:

Clear/Delete All Data from a Dataset using C#[^]

Posted 6-Jan-16 20:01pm

deepankarbhatnagar

Maciej Los · Answer 2 · 2016-01-06T20:53:00

Solution 2

Please, read my comment to the question.

DataSet.Clear() method[^] clears the dataset by removing all rows in all tables.
If you want to clear all tables and remove all relations, foreign constraints, and tables from the DataSet, use DataSet.Reset() method[^].

Posted 6-Jan-16 20:53pm

Maciej Los