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[英]How can I call a method when data binding gridview to edit data before displaying it?
[英]How can I dynamically edit gridview data?
如何編輯和刪除未與數據庫連接的gridview中的字段,並使用用戶在文本框中輸入的數據填充gridview? 另外,如何使用gridview中的刪除按鈕刪除行?
這是我在ASP頁面中的網格視圖:
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CssClass="mGrid"
ShowFooter="True" ShowHeaderWhenEmpty="True" Width="70%" OnRowDataBound="GridView1_RowDataBound"
OnRowCommand="GridView1_RowCommand" OnRowCancelingEdit="GridView1_RowCancelingEdit"
OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating">
<AlternatingRowStyle CssClass="alt" />
<Columns>
<asp:TemplateField HeaderText="Item Code">
<EditItemTemplate>
<asp:TextBox ID="txtItemCode" runat="server" Text='<%# Bind("ItemCode") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="ItemCode" runat="server" Text='<%# Bind("ItemCode") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Product">
<EditItemTemplate>
<asp:TextBox ID="txtProduct" runat="server" Text='<%# Bind("Product") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Product" runat="server" Text='<%# Bind("Product") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Unit Price">
<EditItemTemplate>
<asp:TextBox ID="txtUnitPrice" runat="server" Text='<%# Bind("UnitPrice") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="UnitPrice" runat="server" Text='<%# Bind("UnitPrice") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Batch">
<EditItemTemplate>
<asp:TextBox ID="txtBatch" runat="server" Text='<%# Bind("Batch") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Batch" runat="server" Text='<%# Bind("Batch") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField FooterText="Total" HeaderText="Expiary Date">
<EditItemTemplate>
<asp:TextBox ID="txtExpiaryDate" runat="server" Text='<%# Bind("ExpiaryDate") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="ExpiaryDate" runat="server" Text='<%# Bind("ExpiaryDate") %>'></asp:Label>
</ItemTemplate>
<FooterStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Quantity">
<EditItemTemplate>
<asp:TextBox ID="txtQuantity" runat="server" Text='<%# Bind("Quantity") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Quantity" runat="server" Text='<%# Eval("Quantity") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:Label ID="GetQuantity" runat="server" Text='<%# GetQuantity() %>'></asp:Label>
</FooterTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Total">
<ItemTemplate>
<asp:Label ID="Total" runat="server" Text='<%# Eval("Total") %>'></asp:Label>
</ItemTemplate>
<FooterTemplate>
<asp:Label ID="GetTotal" runat="server" Text='<%# GetTotal() %>'></asp:Label>
</FooterTemplate>
</asp:TemplateField>
<asp:CommandField ButtonType="Image" DeleteImageUrl="~/Images/delete.png" EditImageUrl="~/Images/edit.png"
HeaderText="EDIT" ShowDeleteButton="True" ShowEditButton="True" />
</Columns>
<FooterStyle BackColor="Gainsboro" ForeColor="Black" />
<PagerStyle CssClass="pgr" HorizontalAlign="Right" />
</asp:GridView>
我正在使用此代碼將數據添加到網格。
protected void btnAdd_Click(object sender, EventArgs e)
{
if (ViewState["CurrentData"] != null)
{
var dt = (DataTable)ViewState["CurrentData"];
var count = dt.Rows.Count;
BindGrid(count);
}
else
{
BindGrid(1);
}
Clear();
}
private void BindGrid(int rowcount)
{
var DataTbl = new DataTable();
DataRow DataRw;
DataTbl.Columns.Add("ItemCode", typeof(String));
DataTbl.Columns.Add("Product", typeof(String));
DataTbl.Columns.Add("UnitPrice", typeof(String));
DataTbl.Columns.Add("Batch", typeof(String));
DataTbl.Columns.Add("ExpiaryDate", typeof(String));
DataTbl.Columns.Add("Quantity", typeof(double));
DataTbl.Columns.Add("Total", typeof(double));
if (ViewState["CurrentData"] != null)
{
for (var i = 0; i < rowcount + 1; i++)
{
DataTbl = (DataTable)ViewState["CurrentData"];
if (DataTbl.Rows.Count > 0)
{
DataRw = DataTbl.NewRow();
DataRw[0] = DataTbl.Rows[0][0].ToString();
}
}
DataRw = DataTbl.NewRow();
DataRw[0] = txtItemCode.Text;
DataRw[1] = ddlProduct.SelectedItem;
DataRw[2] = txtUnitPrice.Text;
DataRw[3] = txtBatch.Text;
DataRw[4] = txtExpiaryDate.Text;
DataRw[5] = txtQty.Text;
DataRw[6] = (Convert.ToInt32(Convert.ToDouble(
txtUnitPrice.Text) * Convert.ToDouble(
txtQty.Text)) - ((Convert.ToDouble(
txtUnitPrice.Text) * Convert.ToDouble(
txtQty.Text))) * Convert.ToDouble(
txtProductDiscount.Text) / 100).ToString();
DataTbl.Rows.Add(DataRw);
}
else
{
DataRw = DataTbl.NewRow();
DataRw[0] = txtItemCode.Text;
DataRw[1] = ddlProduct.SelectedItem;
DataRw[2] = txtUnitPrice.Text;
DataRw[3] = txtBatch.Text;
DataRw[4] = txtExpiaryDate.Text;
DataRw[5] = txtQty.Text;
DataRw[6] = (Convert.ToInt32(Convert.ToDouble(
txtUnitPrice.Text) * Convert.ToDouble(
txtQty.Text)) - ((Convert.ToDouble(
txtUnitPrice.Text) * Convert.ToDouble(
txtQty.Text))) * Convert.ToDouble(
txtProductDiscount.Text) / 100).ToString();
DataTbl.Rows.Add(DataRw);
}
if (ViewState["CurrentData"] != null)
{
GridView1.DataSource = (DataTable)ViewState["CurrentData"];
GridView1.DataBind();
}
else
{
GridView1.DataSource = DataTbl;
GridView1.DataBind();
}
ViewState["CurrentData"] = DataTbl;
}
首先您的代碼和查詢不清楚。 如果我理解正確,那么您代碼中的問題是數據沒有刪除或更新。
正如我在您的代碼中看到的那樣,您正在以視圖狀態保存數據。 請在GridView1_RowUpdating()
和GridView1_RowCommand()
(希望將其用於刪除)事件的階段重新檢查您的代碼。 deleting/updating
數據后,您還應該更新視圖狀態。
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