datacolumn

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Programatically set the width of a DataColumn for use with a DataGrid

I assign a column programmatically to a DataTable like this: myDataTable.Column开发者_开发知识库s.Add(myDataColumn);[详细]

2023-01-17 02:05 分类：问答
Testing equality of DataColumn values in C#

I\'ve written some code to test equality between column values in DataTables when the column type isn\'t known.[详细]

2023-01-05 05:02 分类：问答
How to save an expression datacolumn to the database?

I have a datagridview on a form with multiple columns. Three of the columns are expression columns. One column is subtracted from the second and the result is displayed in the third. Everything works开[详细]

2023-01-05 01:42 分类：问答
A null value should be considered as 0 when addition of it is done with decimal value

There are three column in the datatable A,B and C. Now each column is type of decimal. Now I am doing like dt.Columns[\"A\"].Expression=\"B+C\"; to make addition of Column B\'s record and column C\'s[详细]

2022-12-30 14:38 分类：问答
DataTable.Select Behaves Strangely Using ISNULL Operator on NULL DateTime Column

I have a DataTable with a DateTime column, \"DateCol\", that can be DBNull.The DataTable has one row in it with a NULL value in this column.[详细]

2022-12-30 02:44 分类：问答
Can I configure a strongly typed data set to use nullable values?

If I have a strongly typed data table with a column for values of type Int32, and 开发者_开发问答this column allows nulls, then I\'ll get an exception if I do this for a row where the value is null:[详细]

2022-12-28 19:05 分类：问答
How do I get column names to print in this C# program?

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[详细]

2022-12-25 13:25 分类：问答
Convert string to guid in DataColumn

How do you convert a DataColumn of GUIDs开发者_StackOverflow set as type string to a DataColumn of GUIDs where the type is Guid? A column in the source data has the wrong type and I cannot change it t[详细]

2022-12-15 06:25 分类：问答
Seeing named datacolumns in Visual Studio debugger?

When I\'m debugging a datatable, say in th开发者_如何学运维e watch window, I\'ll often choose the Rows property, and then a particular index-- 0 or 1, often times.[详细]

2022-12-14 19:10 分类：问答
Using an (I)List<string> as the source for a DataColumn

I\'m playing around wi开发者_运维技巧th the DataGridView control offered by .NET. Upon till now I seem to be unable to bind an (I)List to a DataColumn.[详细]

2022-12-13 10:01 分类：问答