本文整理汇总了C#中System.Data.Constraint类的典型用法代码示例。如果您正苦于以下问题：C# Constraint类的具体用法？C# Constraint怎么用？C# Constraint使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
Constraint类属于System.Data命名空间，在下文中一共展示了Constraint类的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: GetConstraints
private void GetConstraints(DataTable dataTable)
{
Console.WriteLine();
// Print the table's name.
Console.WriteLine("TableName: " + dataTable.TableName);
// Iterate through the collection and
// print each name and type value.
foreach(Constraint constraint in dataTable.Constraints )
{
Console.WriteLine("Constraint Name: "
+ constraint.ConstraintName);
Console.WriteLine("Type: "
+ constraint.GetType().ToString());
// If the constraint is a UniqueConstraint,
// print its properties using a function below.
if(constraint is UniqueConstraint)
{
PrintUniqueConstraintProperties(constraint);
}
// If the constraint is a ForeignKeyConstraint,
// print its properties using a function below.
if(constraint is ForeignKeyConstraint)
{
PrintForeigKeyConstraintProperties(constraint);
}
}
}
private void PrintUniqueConstraintProperties(
Constraint constraint)
{
UniqueConstraint uniqueConstraint;
uniqueConstraint = (UniqueConstraint) constraint;
// Get the Columns as an array.
DataColumn[] columnArray;
columnArray = uniqueConstraint.Columns;
// Print each column's name.
for(int i = 0;i<columnArray.Length ;i++)
{
Console.WriteLine("Column Name: "
+ columnArray[i].ColumnName);
}
}
private void PrintForeigKeyConstraintProperties(
Constraint constraint)
{
ForeignKeyConstraint fkConstraint;
fkConstraint = (ForeignKeyConstraint) constraint;
// Get the Columns as an array.
DataColumn[] columnArray;
columnArray = fkConstraint.Columns;
// Print each column's name.
for(int i = 0;i<columnArray.Length ;i++)
{
Console.WriteLine("Column Name: "
+ columnArray[i].ColumnName);
}
Console.WriteLine();
// Get the related columns and print each columns name.
columnArray = fkConstraint.RelatedColumns ;
for(int i = 0;i<columnArray.Length ;i++)
{
Console.WriteLine("Related Column Name: "
+ columnArray[i].ColumnName);
}
Console.WriteLine();
}