[英]C# ASP.NET GridView UpdateRow
我在 GridView Web 控件中編輯行時遇到問題。 我正在用 ASP.NET 編寫一個應用程序,並使用 NHibernate 從 MySQL 數據庫中獲取數據。 我有帶有 GridView 控件的 *.aspx 頁面。 商品.aspx代碼:
<asp:GridView ID="tgv" runat="server" Width="915px" AutoGenerateColumns="False"
onrowcancelingedit="tgv_RowCancelingEdit" onrowediting="tgv_RowEditing"
onrowupdating="TaskGridView_RowUpdating">
<RowStyle HorizontalAlign="Center" />
<columns>
<asp:boundfield datafield="Tovar_ID" headertext="ID" ReadOnly="True"/>
<asp:TemplateField HeaderText="Name">
<EditItemTemplate>
<asp:TextBox ID="editName" runat="server" Text='<%#Eval("Tovar_name") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%#Eval("Tovar_name") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Measure">
<EditItemTemplate>
<asp:TextBox ID="editMeasure" runat="server" Text='<%#Eval("Measure") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%#Eval("Measure") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Buying price">
<EditItemTemplate>
<asp:TextBox ID="editBPrice" runat="server" Text='<%#Eval("Buying_Price") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%#Eval("Buying_Price") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Selling price">
<EditItemTemplate>
<asp:TextBox ID="editSPrice" runat="server" Text='<%#Eval("Selling_Price") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label4" runat="server" Text='<%# Eval("Selling_Price") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowDeleteButton="True" />
<asp:CommandField ShowEditButton="True" />
</columns>
</asp:GridView>
我正在嘗試在下一個代碼中編輯數據:
protected void tgv_RowEditing(object sender, GridViewEditEventArgs e)
{
//Set the edit index.
tgv.EditIndex = e.NewEditIndex;
//Bind data to the GridView control.
tgv.DataBind();
}
protected void tgv_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
//Reset the edit index.
tgv.EditIndex = -1;
//Bind data to the GridView control.
tgv.DataBind();
}
protected void tgv_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
GridViewRow row = tgv.Rows[e.RowIndex];
ISession session = Transport.GetCurrentSession();
ITransaction tx = session.BeginTransaction();
Tovar t = session.Get<Tovar>(Convert.ToInt32(row.Cells[0].Text));
string st = ((TextBox)tgv.Rows[e.RowIndex].FindControl("editName")).Text;
t.tname = st;
Response.Write(st);
session.Update(t);
tx.Commit();
session.Flush();
Transport.CloseSession();
tgv.EditIndex = -1;
tgv.DataBind();
}
當我單擊“保存”按鈕時,它會將文本框中的舊值保存到數據庫中。 我該如何解決這個問題? 我知道,有很多帖子都有這個問題。 我看了 5 個帖子,沒有找到解決方案。
頁面加載代碼:
protected void Page_Load(object sender, EventArgs e)
{
ISession session = Transport.GetCurrentSession();
ITransaction tx = session.BeginTransaction();
DataTable dt = new DataTable();
DataColumn dc = new DataColumn();
dc.ColumnName = "Tovar_ID";
dc.DataType = System.Type.GetType("System.Int32");
dt.Columns.Add(dc);
dc = new DataColumn();
dc.ColumnName = "Tovar_name";
dc.DataType = System.Type.GetType("System.String");
dt.Columns.Add(dc);
dc = new DataColumn();
dc.ColumnName = "Measure";
dc.DataType = System.Type.GetType("System.String");
dt.Columns.Add(dc);
dc = new DataColumn();
dc.ColumnName = "Buying_Price";
dc.DataType = System.Type.GetType("System.String");
dt.Columns.Add(dc);
dc = new DataColumn();
dc.ColumnName = "Selling_Price";
dc.DataType = System.Type.GetType("System.String");
dt.Columns.Add(dc);
IQuery goodsQuery = session.CreateQuery
("select a from Tovar as a order by a.tovarid");
foreach (Tovar a in goodsQuery.Enumerable<Tovar>())
{
dt.Rows.Add(a.tovarid, a.tname, a.measure, a.bprice, a.sprice);
}
tgv.DataSource = dt;
tgv.DataBind();
tx.Commit();
session.Flush();
Transport.CloseSession();
}
在調用 Databind 之前,您應該將 DataSource 分配給 Gridview 。 tg.DataSource=dt;
tgv.DataBind();
此外,在您的頁面加載中,僅第一次檢查和綁定 gridview
如果 (!Page.IsPostBack)
//綁定Gridview()
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