Asp.net 以编程方式将数据键添加到现有的数据键集

我有一个GridView，它有几个数据键。在一组特定的情况下，我需要在页面加载事件期间从代码隐藏中添加一个额外的datakey

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如何以编程方式将数据键添加到GridView中的现有数据键集？

最简单的方法是将DataKeyName的字符串数组转换为ArrayList，添加新的DataKeyName，然后将此ArrayList转换回String（）数组，然后使用此设置GridView的DataKeyNames属性。以下是一个例子：

Dim arr As New ArrayList()
Dim keys As String() = GridView1.DataKeyNames

//Convert to an ArrayList and add the new key.
arr.AddRange(keys)
arr.Add("New Key")

//Convert back to a string array and set the property.
Dim newkeys As String() = CType(arr.ToArray(Type.GetType("System.String")), String())
GridView1.DataKeyNames = newkeys

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最简单的方法是将DataKeyName的字符串数组转换为ArrayList，添加新的DataKeyName，然后将此ArrayList转换回String（）数组，然后使用此参数设置Gridview的DataKeyNames属性。以下是一个例子：

Dim arr As New ArrayList()
Dim keys As String() = GridView1.DataKeyNames

//Convert to an ArrayList and add the new key.
arr.AddRange(keys)
arr.Add("New Key")

//Convert back to a string array and set the property.
Dim newkeys As String() = CType(arr.ToArray(Type.GetType("System.String")), String())
GridView1.DataKeyNames = newkeys

试试这个

 //get length of existing keys
 int keyLength = MyGrid.DataKeyNames.Length;

 //create newkeys array with an extra space to take the new key
 string[] newkeys = new string[keyLength+1];

 //copy the old keys to the newkeys array
 for (int i = 0; i < keyLength; i++)
    newkeys[i] = MyGrid.DataKeyNames[i];

 //add the new key in the last location
 newkeys[keyLength] = "MyNewKey";

 //update your datakeys
 MyGrid.DataKeyNames = newkeys;

//获取现有密钥的长度
int keyLength=MyGrid.DataKeyNames.Length；
//创建带有额外空间的newkeys数组以获取新密钥
string[]newkeys=新字符串[keyLength+1]；
//将旧密钥复制到newkeys数组
for（int i=0；i

试试这个

 //get length of existing keys
 int keyLength = MyGrid.DataKeyNames.Length;

 //create newkeys array with an extra space to take the new key
 string[] newkeys = new string[keyLength+1];

 //copy the old keys to the newkeys array
 for (int i = 0; i < keyLength; i++)
    newkeys[i] = MyGrid.DataKeyNames[i];

 //add the new key in the last location
 newkeys[keyLength] = "MyNewKey";

 //update your datakeys
 MyGrid.DataKeyNames = newkeys;

//获取现有密钥的长度
int keyLength=MyGrid.DataKeyNames.Length；
//创建带有额外空间的newkeys数组以获取新密钥
string[]newkeys=新字符串[keyLength+1]；
//将旧密钥复制到newkeys数组
for（int i=0；i