如何修改dataset中的表中的数据，并通过data adapter将修改提交的数据源？

Question

seehttp://www.codeproject.com/cs/database/relationaladonet.asp

Answer 1

http://www.c-sharpcorner.com/Database/PlayingWithDataGridTA.asp

Answer 2

SqlDataAdapter catDA = new SqlDataAdapter("SELECT CategoryID, CategoryName FROM Categories", nwindConn);       catDA.UpdateCommand = new SqlCommand("UPDATE Categories SET CategoryName = @CategoryName " +
                                     "WHERE CategoryID = @CategoryID" , nwindConn);catDA.UpdateCommand.Parameters.Add("@CategoryName", SqlDbType.NVarChar, 15, "CategoryName");SqlParameter workParm = catDA.UpdateCommand.Parameters.Add("@CategoryID", SqlDbType.Int);
workParm.SourceColumn = "CategoryID";
workParm.SourceVersion = DataRowVersion.Original;DataSet catDS = new DataSet();
catDA.Fill(catDS, "Categories");   DataRow cRow = catDS.Tables["Categories"].Rows[0];
cRow["CategoryName"] = "New Category";catDA.Update(catDS);

Answer 3

首先取得数据,放到DataGrid里System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection("server=localhost;database=northWind;uid=sa;password=110");
conn.Open();
System.Data.SqlClient.SqlDataAdapter da = new System.Data.SqlClient.SqlDataAdapter("select * from student",conn);
dt = new System.Data.DataSet();
da.Fill(dt,"student");然后绑定数据集和DataGrid
DataGrid.SetDataBinding(dt,"student");
如果需要，可以绑定TextBox来作录入，而用DataGrid显示
this.textBox16.DataBindings.Add("Text",dt,"student.stuno");
然后进行数据的操作如：
增加:
this.BindingContext[dt,"student"].AddNew();
删除:
this.BindingContext[dt,"student"].RemoveAt(this.BindingContext[dt,"student"].Position);
最后把结果写回数据库:
// sqlInsertCommand1
// 
this.sqlInsertCommand1.CommandText = "INSERT INTO student(stuno, name) VALUES (@stuno, @name)"; 
this.sqlInsertCommand1.Connection = this.conn;
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@stuno", System.Data.SqlDbType.VarChar, 4, "stuno"));
this.sqlInsertCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@name", System.Data.SqlDbType.VarChar, 50, "name"));
// 
// sqlUpdateCommand1
// 
this.sqlUpdateCommand1.CommandText = "UPDATE student SET stuno = @stuno, name = @name WHERE (stuno = @Original_stuno)";
this.sqlUpdateCommand1.Connection = this.conn;
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@stuno", System.Data.SqlDbType.VarChar, 4, "stuno"));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@name", System.Data.SqlDbType.VarChar, 50, "name"));
this.sqlUpdateCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_stuno", System.Data.SqlDbType.VarChar, 4, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "stuno", System.Data.DataRowVersion.Original, null));
 
// sqlDeleteCommand1
// 
this.sqlDeleteCommand1.CommandText = "DELETE FROM student WHERE (stuno = @Original_stuno)";
this.sqlDeleteCommand1.Connection = this.conn;
this.sqlDeleteCommand1.Parameters.Add(new System.Data.SqlClient.SqlParameter("@Original_stuno", System.Data.SqlDbType.VarChar, 4, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "stuno", System.Data.DataRowVersion.Original, null));

this.sqlDa.DeleteCommand = this.sqlDeleteCommand1;
this.sqlDa.InsertCommand = this.sqlInsertCommand1;
this.sqlDa.UpdateCommand = this.sqlUpdateCommand1;
try
{
sqlDa.Update(dt.GetChanges,"student"); 
return true;
}
catch(System.Data.SqlClient.SqlException ex)
{

return false;
} 
finally
{
conn.Close();
}

Answer 4

我建议你去看一下WWW。WROX。COM出的ADO。NET高级编程，上面的讲的东西很全面的。很详细的

Answer 5

sigh,这么简单一个问题引得这么多高手回复，楼主好大面子哦