本文整理汇总了C#中DataColumn.ToString方法的典型用法代码示例。如果您正苦于以下问题：C# DataColumn.ToString方法的具体用法？C# DataColumn.ToString怎么用？C# DataColumn.ToString使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DataColumn的用法示例。
在下文中一共展示了DataColumn.ToString方法的3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: AddRange
public void AddRange()
{
DataTable Table = new DataTable("test_table");
DataTable Table2 = new DataTable("test_table2");
DataColumnCollection Cols = Table.Columns;
DataColumn C = null;
DataColumn[] ColArray = new DataColumn[2];
C = new DataColumn("test1");
ColArray[0] = C;
C = new DataColumn("test2");
C.AllowDBNull = false;
C.Caption = "Test_caption";
C.DataType = typeof(XmlReader);
ColArray[1] = C;
Cols.AddRange(ColArray);
C = Cols[0];
Assert.True(C.AllowDBNull);
Assert.False(C.AutoIncrement);
Assert.Equal(0L, C.AutoIncrementSeed);
Assert.Equal(1L, C.AutoIncrementStep);
Assert.Equal("test1", C.Caption);
Assert.Equal("Element", C.ColumnMapping.ToString());
Assert.Equal("test1", C.ColumnName);
Assert.Null(C.Container);
Assert.Equal(typeof(string), C.DataType);
Assert.Equal(DBNull.Value, C.DefaultValue);
Assert.False(C.DesignMode);
Assert.Equal("", C.Expression);
Assert.Equal(0, C.ExtendedProperties.Count);
Assert.Equal(-1, C.MaxLength);
Assert.Equal("", C.Namespace);
Assert.Equal(0, C.Ordinal);
Assert.Equal("", C.Prefix);
Assert.False(C.ReadOnly);
Assert.Null(C.Site);
Assert.Equal("test_table", C.Table.TableName);
Assert.Equal("test1", C.ToString());
Assert.False(C.Unique);
C = Cols[1];
Assert.False(C.AllowDBNull);
Assert.False(C.AutoIncrement);
Assert.Equal(0L, C.AutoIncrementSeed);
Assert.Equal(1L, C.AutoIncrementStep);
Assert.Equal("Test_caption", C.Caption);
Assert.Equal("Element", C.ColumnMapping.ToString());
Assert.Equal("test2", C.ColumnName);
Assert.Null(C.Container);
Assert.Equal(typeof(XmlReader), C.DataType);
Assert.Equal(DBNull.Value, C.DefaultValue);
Assert.False(C.DesignMode);
Assert.Equal("", C.Expression);
Assert.Equal(0, C.ExtendedProperties.Count);
Assert.Equal(-1, C.MaxLength);
Assert.Equal("", C.Namespace);
Assert.Equal(1, C.Ordinal);
Assert.Equal("", C.Prefix);
Assert.False(C.ReadOnly);
Assert.Null(C.Site);
Assert.Equal("test_table", C.Table.TableName);
Assert.Equal("test2", C.ToString());
Assert.False(C.Unique);
}示例2: Add
public void Add()
{
var Table = new DataTable("test_table");
DataColumnCollection cols = Table.Columns;
DataColumn c = null;
cols.Add();
cols.Add();
for (int i = 0; i < 2; i++)
{
c = cols[i];
Assert.True(c.AllowDBNull);
Assert.False(c.AutoIncrement);
Assert.Equal(0L, c.AutoIncrementSeed);
Assert.Equal(1L, c.AutoIncrementStep);
Assert.Equal($"Column{i + 1}", c.Caption);
Assert.Equal("Element", c.ColumnMapping.ToString());
Assert.Equal($"Column{i + 1}", c.ColumnName);
Assert.Null(c.Container);
Assert.Equal(typeof(string), c.DataType);
Assert.Equal(DBNull.Value, c.DefaultValue);
Assert.False(c.DesignMode);
Assert.Equal("", c.Expression);
Assert.Equal(0, c.ExtendedProperties.Count);
Assert.Equal(-1, c.MaxLength);
Assert.Equal("", c.Namespace);
Assert.Equal(i, c.Ordinal);
Assert.Equal("", c.Prefix);
Assert.False(c.ReadOnly);
Assert.Null(c.Site);
Assert.Equal("test_table", c.Table.TableName);
Assert.Equal($"Column{i + 1}", c.ToString());
Assert.False(c.Unique);
}
cols.Add("test1", typeof(int), "");
cols.Add("test2", typeof(string), "Column1 + Column2");
c = cols[2];
Assert.True(c.AllowDBNull);
Assert.False(c.AutoIncrement);
Assert.Equal(0L, c.AutoIncrementSeed);
Assert.Equal(1L, c.AutoIncrementStep);
Assert.Equal("test1", c.Caption);
Assert.Equal("Element", c.ColumnMapping.ToString());
Assert.Equal("test1", c.ColumnName);
Assert.Null(c.Container);
Assert.Equal(typeof(int), c.DataType);
Assert.Equal(DBNull.Value, c.DefaultValue);
Assert.False(c.DesignMode);
Assert.Equal("", c.Expression);
Assert.Equal(0, c.ExtendedProperties.Count);
Assert.Equal(-1, c.MaxLength);
Assert.Equal("", c.Namespace);
Assert.Equal(2, c.Ordinal);
Assert.Equal("", c.Prefix);
Assert.False(c.ReadOnly);
Assert.Null(c.Site);
Assert.Equal("test_table", c.Table.TableName);
Assert.Equal("test1", c.ToString());
Assert.False(c.Unique);
c = cols[3];
Assert.True(c.AllowDBNull);
Assert.False(c.AutoIncrement);
Assert.Equal(0L, c.AutoIncrementSeed);
Assert.Equal(1L, c.AutoIncrementStep);
Assert.Equal("test2", c.Caption);
Assert.Equal("Element", c.ColumnMapping.ToString());
Assert.Equal("test2", c.ColumnName);
Assert.Null(c.Container);
Assert.Equal(typeof(string), c.DataType);
Assert.Equal(DBNull.Value, c.DefaultValue);
Assert.False(c.DesignMode);
Assert.Equal("Column1 + Column2", c.Expression);
Assert.Equal(0, c.ExtendedProperties.Count);
Assert.Equal(-1, c.MaxLength);
Assert.Equal("", c.Namespace);
Assert.Equal(3, c.Ordinal);
Assert.Equal("", c.Prefix);
Assert.True(c.ReadOnly);
Assert.Null(c.Site);
Assert.Equal("test_table", c.Table.TableName);
Assert.Equal("test2 + Column1 + Column2", c.ToString());
Assert.False(c.Unique);
c = new DataColumn("test3", typeof(int));
cols.Add(c);
c = cols[4];
Assert.True(c.AllowDBNull);
Assert.False(c.AutoIncrement);
Assert.Equal(0L, c.AutoIncrementSeed);
Assert.Equal(1L, c.AutoIncrementStep);
Assert.Equal("test3", c.Caption);
Assert.Equal("Element", c.ColumnMapping.ToString());
Assert.Equal("test3", c.ColumnName);
Assert.Null(c.Container);
Assert.Equal(typeof(int), c.DataType);
Assert.Equal(DBNull.Value, c.DefaultValue);
//.........这里部分代码省略.........
示例3: TestToString
public void TestToString()
{
DataColumn dc;
string sColName, sExp;
dc = new DataColumn();
//ToString = ColumnName
sColName = "Test1";
dc.ColumnName = sColName;
// ToString - ColumnName
Assert.Equal(sColName, dc.ToString());
//TosTring = ColumnName + " + " + Expression
sExp = "Tax * 1.234";
dc.Expression = sExp;
// TosTring=ColumnName + Expression
Assert.Equal(sColName + " + " + sExp, dc.ToString());
}