Get a DataTable Columns DataType

问题:

DataTable dt = new DataTable();  
dt.Columns.Add(new DataColumn(gridColumn1, typeof(bool)));

I was expecting the result of the below line to include info about the DataColumns Type (bool):

?dt.Columns[0].GetType()

回答1:

What you want to use is this property:

dt.Columns[0].DataType

The DataType property will set to one of the following:

Boolean
Byte
Char
DateTime
Decimal
Double
Int16
Int32
Int64
SByte
Single
String
TimeSpan
UInt16
UInt32
UInt64

DataColumn.DataType Property MSDN Reference

回答2:

dt.Columns[0].DataType.Name.ToString()

回答3:

You could always use typeof in the if statement. It is better than working with string values like the answer of Natarajan.

if (dt.Columns[0].DataType == typeof(DateTime))
{
}

回答4:

You can get column type of DataTable with DataType attribute of datatable column like below:

var type = dt.Columns[0].DataType

dt : DataTable object.

0 : DataTable column index.

Hope It Helps

Ty :)

回答5:

if (dr[dc.ColumnName].GetType().ToString() == "System.DateTime")