datarow

How do I check for the existence of a column in a datarow? I'm building datatables to organize some data that I've already pulled back from the database. Depending on the type of data in each row, I need to create a datatable with different columns. Then, later on, I want to check and see if the datatable I am looking at has a certain column. I know I can catch the exception and handle it that way, but I'm curious if there is a property or method on the datarow object that will do this for me? Here's how I can do it by catching the exception: public static String CheckEmptyDataRowItem(DataRow

I'm getting values from another data table as input to list. Now i need to save those list values into another DataTable. List: List<DataRow> list = slectedFieldsTable.AsEnumerable().ToList(); foreach (DataRow dr in slectedFieldsTable.Rows) { list.Add(dr); } New Data table : DataRow newRow = tempTable.NewRow(); newRow["Field Name"] = fieldLabel; newRow["Field Type"] = fieldType; for(int gg =0 ; gg<list.Count; gg++) { tempTable.Rows.Add(????); } I'm stuck here in adding up rows in to new data table. public static DataTable ToDataTable<T>(List<T> items) { DataTable dataTable = new DataTable

This question already has an answer here: How do I loop through items in a list box and then remove those item? 8 answers I have for-each loop in which the data row is updated so the exception , Collection was modified; enumeration operation might not execute is generated. any way to fix it? i have seen To-List function but it is not working with data row , here is my code: foreach (DataRow row in dataTable.Rows) { temp = row[0].ToString(); foreach (DataRow rows in dataTable.Rows) { if (temp == rows[0].ToString()) { tempdatatable.Rows.Add(row[0],row[1]); dataTable.Rows.Remove(rows); //Update

I got this: DataTable dtEntity = CreateDataTable(); drEntity = dtEntity.NewRow(); Then I add data to the row (or not). Lots of code, really don't know if there's anything inside the row. Depends on the input (i am importing from some files). I'd like to do something like: if (drEntity`s EVERY CELL IS NOT EMPTY) { dtEntity.Rows.Add(drEntity); } else { //don't add, will create a new one (drEntity = dtEntity.NewRow();) } Is there some nice way to check if the DataRow's every cell is empty? Or I should foreach, and check them one by one? A simple method along the lines of: bool AreAllColumnsEmpty

I don't understand why this code does not work. foreach (DataRow dataRow in dataTable.Rows) { if (true) { dataRow.Delete(); } } Even though DataRow.Delete doesn't modify the state of the collection, Microsoft documentation states that you shouldn't call it while iterating over the collection: Neither Delete nor Remove should be called in a foreach loop while iterating through a DataRowCollection object. Delete nor Remove modify the state of the collection. The best solution is usually to create a separate collection (e.g. a List<DataRow> ) of items you want to remove, and then remove them

I have some code which sets the value of cells in a DataRow by column name i.e. row["ColumnName"] = someValue; I want to also set the value for this row in the column immediately to the right of the one found above. Clearly if I was getting the cell by index rather than by column name this would be easy. So is there a way of getting the column index from the column name thus allowing me to do: row[index + 1] = someOtherValue; i.e. do I need create some kind of dictionary of column index and column names when the table is initially created, or can I get the index from the column name later on

I've cobbled together a C# program that takes a .csv file and writes it to a DataTable . Using this program, I can loop through each row of the DataTable and print out the information contained in the row. The console output looks like this: --- Row --- Item: 1 Item: 545 Item: 507 Item: 484 Item: 501 I'd like to print the column name beside each value, as well, so that it looks like this: --- Row --- Item: 1 Hour Item: 545 Day1 KW Item: 507 Day2 KW Item: 484 Day3 KW Item: 501 Day4 KW Can someone look at my code and tell me what I can add so that the column names will print? I am very new to C#

I want to convert a DataRow array into DataTable ... What is the simplest way to do this? Why not iterate through your DataRow array and add (using DataRow.ImportRow, if necessary, to get a copy of the DataRow), something like: foreach (DataRow row in rowArray) { dataTable.ImportRow(row); } Make sure your dataTable has the same schema as the DataRows in your DataRow array. joe For .Net Framework 3.5+ DataTable dt = new DataTable(); DataRow[] dr = dt.Select("Your string"); DataTable dt1 = dr.CopyToDataTable(); But if there is no rows in the array, it can cause the errors such as The source