批量更新数据

一个update的例子:
<％@ Page language="C#" Debug="true" ％>
<％@ Import Namespace="System.Data" ％>
<％@ Import Namespace="System.Data.SqlClient" ％>

<script runat="server">
void Page_Load(object sender, System.EventArgs e){
SqlConnection conn = new SqlConnection("server=localhost;uid=sa;pwd=kingapex;database=tourmsg");
SqlDataAdapter da = new SqlDataAdapter();
SqlCommand cmd = new SqlCommand("select top 2 id,groupnumber as groupnumber1 from [grouptb]",conn);
DataSet ds = new DataSet();
conn.Open();
da.SelectCommand = cmd;
da.Fill(ds,"grouptb");

for(int i=0;i<ds.Tables["grouptb"].Rows.Count;i++)
{

Response.Write(ds.Tables["grouptb"].Rows[1]+"<br>");
}

for(int i=0;i<ds.Tables["grouptb"].Rows.Count;i++)
{
ds.Tables["grouptb"].Rows.BeginEdit();
ds.Tables["grouptb"].Rows[1] = "wangfengrr";
ds.Tables["grouptb"].Rows.EndEdit();
}

String updateCmd = "Update grouptb set groupnumber = @groupnumber Where Id=@id";

cmd = new SqlCommand(updateCmd, conn);
cmd.Parameters.Add("@id",SqlDbType.Int,4,"id");
cmd.Parameters.Add("@groupnumber",SqlDbType.Char,10,"groupnumber1");

da.UpdateCommand = cmd;
da.Update(ds,"grouptb");
ds.AcceptChanges();

conn.Close();

}
</script>

下面是一个insert 的例子:

<％@ Page language="C#" Debug="true" ％>
<％@ Import Namespace="System.Data" ％>
<％@ Import Namespace="System.Data.SqlClient" ％>

<script runat="server">
void Page_Load(object sender, System.EventArgs e){

//建立DataTable数据源
DataTable Dt = new DataTable();

DataRow Dr;

Dt.Columns.Add(new DataColumn("groupnumber"));

for(int j =0;j<3;j++){

Dr=Dt.NewRow();

Dr[0]="groupnumber"+j.ToString();

Dt.Rows.Add(Dr);

}

SqlConnection conn = new SqlConnection("server=localhost;uid=sa;pwd=kingapex;database=tourmsg");

SqlDataAdapter MyAdapter = new SqlDataAdapter();

//建立InsertCommand
StringBuilder sb = new StringBuilder("");
sb.Append("INSERT grouptb (groupnumber) VALUES(");
sb.Append("@groupnumber)");
MyAdapter.InsertCommand = new SqlCommand();
MyAdapter.InsertCommand.CommandText = sb.ToString();
MyAdapter.InsertCommand.Connection = conn;

SqlParameter p1 = new SqlParameter("@groupnumber", SqlDbType.VarChar, 40);
p1.SourceVersion = DataRowVersion.Current;
p1.SourceColumn = "groupnumber"; // or p1.SourceColumn = Dt.Columns[0].ColumnName;
MyAdapter.InsertCommand.Parameters.Add(p1);

//Update
MyAdapter.Update(Dt);

conn.Close();
}
</script>