c＃sql update - InvalidOperationException

Question

我正在开发一个需要数据库的项目 我找到了一个我在Youtube上看过的教程，它演示了如何使用SQL Server 2005连接和编辑数据。
但是当我尝试它时，我收到此错误InvalidOperationException

这是整个编辑代码

con.Open();

DataTable dt = new DataTable();
//load all records from sample table
SqlDataAdapter da = new SqlDataAdapter("select * from sampleEdit where ID=" +
    textBox1.Text + " ", con);
da.Fill(dt);

//start the editing of the selected record
dt.Rows[0].BeginEdit();

dt.Rows[0][1] = textBox2.Text;

//stop the editing
dt.Rows[0].EndEdit();

//declare the sql commandbuilder that allow saving of records
SqlCommandBuilder cb = new SqlCommandBuilder(da);

//update the database
da.Update(dt);

//close the connection
con.Close();

//call the method that display the record to the gridview
displayRecords();

错误显示在更新部分 应该是什么问题？

这是完整的异常错误

System.InvalidOperationException: Dynamic SQL generation for the UpdateCommand is not supported against a SelectCommand that does not return any key column information.  
at System.Data.Common.DbDataAdapter.UpdatingRowStatusErrors(RowUpdatingEventArgs rowUpdatedEvent, DataRow dataRow)
at System.Data.Common.DbDataAdapter.Update(DataRow[] dataRows, DataTableMapping tableMapping)
at System.Data.Common.DbDataAdapter.UpdateFromDataTable(DataTable dataTable, DataTableMapping tableMapping)
at System.Data.Common.DbDataAdapter.Update(DataTable dataTable)
at DatabaseConnect3.Form1.btnEdit_Click(Object sender, EventArgs e)

Answer 1

您的源表无效，因为您很可能没有在表上定义主键。只需将ID列作为表的主键，代码就可以正常工作。