How to Change a DataTable Column's Data Type from Double to Int32?
Jan 14, 2025 am 11:48 AMModify the DataColumn data type in DataTable
During data processing, it is often necessary to modify the data type of specific columns in DataTable. This article describes how to convert a column in a DataTable that was originally of type "Double" to type "Int32".
It should be noted that it is not possible to directly modify the data type of the columns in the populated DataTable. However, we can effectively solve this problem by cloning the DataTable.
Solution using DataTable clone: ??
-
Create a copy of the original DataTable using the
Clone()
method:DataTable dtCloned = dt.Clone();
-
Modify the data type of the target column in the cloned DataTable:
dtCloned.Columns[0].DataType = typeof(Int32);
-
Import the data in the original DataTable row by row into the cloned DataTable:
foreach (DataRow row in dt.Rows) { dtCloned.ImportRow(row); }
With the above steps, you can successfully change the data type of the specified column while maintaining data integrity. dtCloned
Columns with changed data types are now included. You can replace the original dtCloned
with dt
.
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