[英]OracleTransaction Update Gridview via Drop Down List
我正在嘗試使用綁定到GridView中的單元格的下拉列表來調用SQL UPDATE語句來更改GridView本身中的記錄。 這是下面的代碼:
<asp:TemplateField HeaderText="Send To...">
<ItemTemplate>
<asp:DropDownList ID="StatusDD" runat="server" AutoPostBack="false" OnSelectedIndexChanged="StatusDD_SelectedIndexChanged">
<asp:ListItem Value="A">Active</asp:ListItem>
<asp:ListItem Value="C">Complete</asp:ListItem>
<asp:ListItem Value="I">In Process</asp:ListItem>
<asp:ListItem Value="E">Error</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
這是后面的代碼,這是我的try-catch塊在ExecuteNonQuery()處掛起我的頁面的地方。 這是執行更新的正確語法嗎? 如上所示,我禁用了AutoPostBack,但無論如何對我沒有任何幫助:
protected void StatusDD_SelectedIndexChanged(object sender, EventArgs e)
{
DropDownList ddl = sender as DropDownList;
ToroGeneral toro = new ToroGeneral();
string connString = toro.GetOracle1ConnectionString();
using (OracleConnection conn1 = new OracleConnection(connString))
{
foreach (GridViewRow row in MMRGrid.Rows)
{
Control ctrl = row.FindControl("StatusDD") as DropDownList;
if (ctrl != null)
{
DropDownList ddl1 = (DropDownList)ctrl;
string qString = "";
// PreQuery work
DropDownList temp = new DropDownList();
temp = (DropDownList)row.FindControl("StatusDD");
string uKey = row.Cells[12].Text;
string tempStr = temp.SelectedValue.ToString().Trim();
if (ddl1.SelectedValue == "A")
{
qString = "UPDATE MATERIALMOVEREQUEST SET PROCESS_FLAG = 'A' WHERE UNIQUEKEY = '" + uKey + "'";
}
else if (ddl1.SelectedValue == "E")
{
qString = "UPDATE MATERIALMOVEREQUEST SET PROCESS_FLAG = 'E' WHERE UNIQUEKEY = '" + uKey + "'";
}
else if (ddl1.SelectedValue == "I")
{
qString = "UPDATE MATERIALMOVEREQUEST SET PROCESS_FLAG = 'I' WHERE UNIQUEKEY = '" + uKey + "'";
}
else if (ddl1.SelectedValue == "C")
{
qString = "UPDATE MATERIALMOVEREQUEST SET PROCESS_FLAG = 'C' WHERE UNIQUEKEY = '" + uKey + "'";
}
else
{
// Error
}
// Change the value of the record in the database.
conn1.Open();
OracleCommand cmd = conn1.CreateCommand();
OracleTransaction myTrans;
cmd.CommandText = qString;
myTrans = conn1.BeginTransaction(IsolationLevel.ReadCommitted);
cmd.Transaction = myTrans;
if (cmd.Connection.State == ConnectionState.Closed)
{
cmd.Connection.Open();
}
try
{
cmd.ExecuteNonQuery();
myTrans.Commit();
}
catch
{
myTrans.Rollback();
}
} // if
} // foreach
}
為什么不使用:
string updateSql = "UPDATE MATERIALMOVEREQUEST SET PROCESS_FLAG = :parameter1 WHEREUNIQUEKEY = :parameter2";"
OracleCommand cmd = new OracleCommand(updateString, conn1);
cmd.BindByName = true;
cmd.Parameters.Add("parameter1", Convert.ToChar(ddl1.SelectedValue);
cmd.Parameters.Add("parameter2", uKey);
myTrans = conn1.BeginTransaction(IsolationLevel.ReadCommitted);
cmd.Transaction = myTrans;
try
{
cmd.ExecuteNonQuery();
myTrans.Commit();
}
catch
{
myTrans.Rollback();
}
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