Obtain the value of a specific column in a DataTable using C#.

In C#, you can use the following method to retrieve the values of a specific column in a DataTable:

1. Iterate through the DataTable using a foreach loop and access the value of a specific column using the DataRow indexer.

DataTable dataTable = new DataTable();
// 假设DataTable中有名为"ColumnName"的列
foreach (DataRow row in dataTable.Rows)
{
    var value = row["ColumnName"];
    // 使用获取到的值进行后续操作
}

1. Retrieve values of specific columns using LINQ query statement.

DataTable dataTable = new DataTable();
// 假设DataTable中有名为"ColumnName"的列
var columnValues = dataTable.AsEnumerable().Select(row => row.Field<string>("ColumnName"));
// 在上述代码中，可以根据实际情况将Field<string>("ColumnName")中的<string>替换为特定列的数据类型

1. Calculate the value of a specific column using the Compute method of DataTable.

DataTable dataTable = new DataTable();
// 假设DataTable中有名为"ColumnName"的列
var columnValues = dataTable.Compute("SELECT ColumnName FROM YourDataTable", null);
// columnValues会返回一个包含特定列的值的数组

The three commonly used methods for retrieving the value of a column in a DataTable using C# have been provided above. Choose the appropriate method based on your specific requirements.