c＃sql update - InvalidOperationException

Question

我正在處理需要數據庫的項目。
我發現我在YouTube中看到的教程，它演示瞭如何連接並使用SQL Server編輯數據2005
但是，當我嘗試了，我收到此錯誤InvalidOperationException

這是整個編輯代碼

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(); 

錯誤顯示在更新部分。
應該是什麼問題？

這是充滿異常錯誤

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

你源表是無效的，因爲你很可能沒有定義的表的主鍵。只需將ID列作爲表格的主鍵，代碼就可以工作。