文本框框TextChanged事件和CheckBoc的CheckedChanged事件的GridView中没有发射 [英] TextBox TextChanged Events and CheckBoc CheckedChanged Events not firing within a gridview

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本文介绍了文本框框TextChanged事件和CheckBoc的CheckedChanged事件的GridView中没有发射的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

所以，我有一个内部的UpdatePanel数据绑定网格视图。

So I've got a databound grid view within a UpdatePanel.

的想法是，用户可以在gridview的内改变数据然后点击保存按钮来更新数据库内的数据。

The idea is that the user can change the data within the gridview then click a save button to update the data within the database.

然而，为了知道哪些行已被更改我有与每个文本框相关联的TextChanged事件，但该事件没有被解雇。

However in order to know which rows have been changed I have a textChanged event associated with each textbox, but the event isn't being fired.

这里是ASP code：

Here's the ASP code:

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
    <span>To update your poducts simply change the details below and click Save...</span>
    <div class="ProductList">
        <asp:GridView ID="ProductList" runat="server" AllowPaging="True" AutoGenerateColumns="False"
            BackColor="#FFFBD6" BorderColor="#FFCC66" BorderStyle="None" BorderWidth="1px"
            CellPadding="3" OnPageIndexChanged="ProductList_PageIndexChanged" OnPageIndexChanging="ProductList_PageIndexChanging"
            PagerSettings-Mode="NumericFirstLast" PageSize="5">
            <FooterStyle BackColor="White" ForeColor="#990000" />
            <Columns>
                <asp:TemplateField HeaderText="Name">
                    <ItemTemplate>
                        <asp:TextBox ID="tbName" AutoPostBack="true" EnableViewState="true" runat="server" BorderStyle="None" OnTextChanged="TextBox_TextChanged"
                            Text='<%# Bind("productName") %>'></asp:TextBox>
                        <asp:HiddenField ID="HiddenField1" runat="server" Value='<%# Eval("productID") %>' />
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Description">
                    <ItemTemplate>
                        <asp:TextBox ID="tbDesc" AutoPostBack="true" EnableViewState="true" runat="server" BorderStyle="None" OnTextChanged="TextBox_TextChanged"
                            Text='<%# Bind("productDesc") %>' TextMode="MultiLine"></asp:TextBox>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Price">
                    <ItemTemplate>
                        <asp:TextBox ID="tbPrice" AutoPostBack="true" EnableViewState="true" runat="server" BorderStyle="None" OnTextChanged="TextBox_TextChanged"
                            Text='<%# Bind("productPrice", "{0:C}") %>'></asp:TextBox>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Select">
                    <ItemTemplate>
                       <asp:CheckBox id="cbDelete"  AutoPostBack="true" EnableViewState="true" runat="server" />
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
            <RowStyle ForeColor="#000066" />
            <SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
            <PagerStyle BackColor="beige" ForeColor="#000066" HorizontalAlign="Left" />
            <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
        </asp:GridView>
    </div>
    <div class="ProductListButtons">
        <asp:ImageButton AlternateText="Add" ToolTip="Add New Product" Width="30px" Height="30px"
            ImageUrl="~/Images/Add.png" ID="AddBtn" runat="server" OnClick="AddBtn_Click" />
        <asp:ImageButton ID="DeleteBtn" runat="server" AlternateText="Delete" Height="30px"
            ImageUrl="~/Images/delete.png" ToolTip="Delete Selected" Width="30px" OnClick="DeleteBtn_Click" />
        <asp:ImageButton AlternateText="Save Changes" ToolTip="Save Changes" Width="30px"
            Height="30px" ImageUrl="~/Images/save-icon.png" ID="SaveBtn" runat="server" OnClick="SaveBtn_Click" />

    </div>
</ContentTemplate>
<Triggers>
    <asp:AsyncPostBackTrigger ControlID="ProductList" EventName="PageIndexChanged" />
    <asp:AsyncPostBackTrigger ControlID="DeleteBtn" EventName="Click" />
</Triggers>

和这里的C＃：

using System;
using System.Data;
using BusinessLogicLayer; 
using DataAccessLayer.Objects;
using System.Web.UI.WebControls;

public partial class Controls_ProductList : System.Web.UI.UserControl
{
public int StallID { get; set; }
bool[] rowChanged;
bool[] rowDeleted;

protected void Page_Load(object sender, EventArgs e)
{
    if (IsPostBack)
    {
        StallID = Convert.ToInt16(ViewState["StallID"].ToString());
    }
    int totalRows = ProductList.Rows.Count;
    rowChanged = new bool[totalRows];
    rowDeleted = new bool[totalRows];
    BindList();
    ViewState.Add("StallID", StallID);
}

public void BindList()
{
    StallHandler handler = new StallHandler();
    DataTable productList = handler.GetProductsByID(StallID);
    ProductList.DataSource = productList;
    ProductList.DataBind();
}

protected void TextBox_TextChanged(object sender, EventArgs e)
{
    TextBox thisTextBox = (TextBox)sender;
    GridViewRow thisGridViewRow = (GridViewRow)thisTextBox.Parent.Parent;
    int row = thisGridViewRow.RowIndex;
    rowChanged[row] = true;
}

protected void cbDelete_CheckedChanged(object sender, EventArgs e)
{
    CheckBox thisCheckbox = (CheckBox)sender;
    GridViewRow thisGridViewRow = (GridViewRow)thisCheckbox.Parent.Parent;
    int row = thisGridViewRow.RowIndex;
    rowDeleted[row] = true;
}

protected void Page_PreRender(object sender, EventArgs e)
{
    if (Page.IsPostBack)
    {
        ProductList.DataBind();
    }
}

protected void ProductList_PageIndexChanged(object sender, EventArgs e)
{
}

protected void ProductList_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
    ProductList.PageIndex = e.NewPageIndex;
    ProductList.DataBind();
}

protected void AddBtn_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
    Response.Redirect("../StallHolder/AddProduct.aspx");
}

protected void DeleteBtn_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
    int totalRows = ProductList.Rows.Count;
    for (int r = 0; r < totalRows; r++)
    {
        if (rowDeleted[r])
        {
            GridViewRow thisGridViewRow = ProductList.Rows[r];
            HiddenField hf1 = (HiddenField)thisGridViewRow.FindControl("HiddenField1");
            string ID = hf1.Value;
            StallHandler handler = new StallHandler();
            handler.DeleteProduct(Convert.ToInt16(ID));
        }
    }       
    BindList();
}

protected void SaveBtn_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
    int totalRows = ProductList.Rows.Count;
    for (int r = 0; r < totalRows; r++)
    {
        if (rowChanged[r])
        {
            GridViewRow thisGridViewRow = ProductList.Rows[r];
            HiddenField hf1 = (HiddenField)thisGridViewRow.FindControl("HiddenField1");
            string ID = hf1.Value;
            TextBox tbName = (TextBox)thisGridViewRow.FindControl("tbName");
            string Name = tbName.Text;
            TextBox tbDesc = (TextBox)thisGridViewRow.FindControl("tbDesc");
            string Desc = tbDesc.Text;
            TextBox tbPrice = (TextBox)thisGridViewRow.FindControl("tbPrice");
            string Price = tbPrice.Text;
            //Code to update the database!
        }
    }
}

}

这就是对不起pretty code沉重的，但我不知道我做错了或者。

Sorry thats pretty code heavy but I have no idea what I'm doing wrong or where.

推荐答案

好吧，有几件事情让这个工作时，我发现。看一看在code片段

Ok, got a couple of things I found when getting this to work. Have a look at the code snippets

ASP：

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
        <span>To update your poducts simply change the details below and click Save...</span>
        <div class="ProductList">
            <asp:GridView ID="ProductList" runat="server" AllowPaging="True" AutoGenerateColumns="False"
                BackColor="#FFFBD6" BorderColor="#FFCC66" BorderStyle="None" BorderWidth="1px"
                CellPadding="3" OnPageIndexChanged="ProductList_PageIndexChanged" OnPageIndexChanging="ProductList_PageIndexChanging"
                PagerSettings-Mode="NumericFirstLast" PageSize="5">
                <FooterStyle BackColor="White" ForeColor="#990000" />
                <Columns>
                    <asp:TemplateField HeaderText="Name">
                        <ItemTemplate>
                            <asp:TextBox ID="tbName" AutoPostBack="false" EnableViewState="true" runat="server" BorderStyle="None" OnTextChanged="TextBox_TextChanged"
                                Text='<%# Bind("productName") %>'></asp:TextBox>
                            <asp:HiddenField ID="HiddenField1" runat="server" Value='<%# Eval("productID") %>' />
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Description">
                        <ItemTemplate>
                            <asp:TextBox ID="tbDesc" AutoPostBack="false" EnableViewState="true" runat="server" BorderStyle="None" OnTextChanged="TextBox_TextChanged"
                                Text='<%# Bind("productDesc") %>' TextMode="MultiLine"></asp:TextBox>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Price">
                        <ItemTemplate>
                            <asp:TextBox ID="tbPrice" AutoPostBack="false" EnableViewState="true" runat="server" BorderStyle="None" OnTextChanged="TextBox_TextChanged"
                                Text='<%# Bind("productPrice", "{0:C}") %>'></asp:TextBox>
                        </ItemTemplate>
                    </asp:TemplateField>
                    <asp:TemplateField HeaderText="Select">
                        <ItemTemplate>
                           <asp:CheckBox id="cbDelete" OnCheckedChanged="cbDelete_CheckedChanged" AutoPostBack="false" EnableViewState="true" runat="server" />
                        </ItemTemplate>
                    </asp:TemplateField>
                </Columns>
                <RowStyle ForeColor="#000066" />
                <SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
                <PagerStyle BackColor="beige" ForeColor="#000066" HorizontalAlign="Left" />
                <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
            </asp:GridView>
        </div>
        <div class="ProductListButtons">
            <asp:ImageButton AlternateText="Add" ToolTip="Add New Product" Width="30px" Height="30px"
                ImageUrl="~/Images/Add.png" ID="AddBtn" runat="server" OnClick="AddBtn_Click" />
            <asp:ImageButton ID="DeleteBtn" runat="server" AlternateText="Delete" Height="30px"
                ImageUrl="~/Images/delete.png" ToolTip="Delete Selected" Width="30px" OnClick="DeleteBtn_Click" />
            <asp:ImageButton AlternateText="Save Changes" ToolTip="Save Changes" Width="30px"
                Height="30px" ImageUrl="~/Images/save-icon.png" ID="SaveBtn" runat="server" OnClick="SaveBtn_Click" />

        </div>
    </ContentTemplate>
</asp:UpdatePanel>

而code-背后：

And the code-behind:

public partial class Controls_ProductList : System.Web.UI.UserControl
{
    public int StallID { get; set; }
    bool[] rowChanged;
    bool[] rowDeleted;

    // this allows me to test your code without your data source (C# 3.0 list constructor)
    private static List<Product> _productList = new List<Product>() { 
            new Product() { productID = 1, productName = "Product 1", productDesc = "This is product 1", productPrice = 1.0m },
            new Product() { productID = 2, productName = "Product 2", productDesc = "This is product 2", productPrice = 1.0m },
            new Product() { productID = 3, productName = "Product 3", productDesc = "This is product 3", productPrice = 1.0m }
        };

    protected void Page_Load(object sender, EventArgs e)
    {
        if (IsPostBack)
        {
            StallID = Convert.ToInt16(ViewState["StallID"].ToString());
        }
        else
        {
            // Only bind if this is not a postback
            BindList();
        }

        int totalRows = ProductList.Rows.Count;
        rowChanged = new bool[totalRows];
        rowDeleted = new bool[totalRows];

        ViewState.Add("StallID", StallID);

        foreach (GridViewRow row in ProductList.Rows)
        {
            var checkBox = row.FindControl("cbDelete");
            ScriptManager1.RegisterAsyncPostBackControl(checkBox);
        }
    }

    public void BindList()
    {
        //StallHandler handler = new StallHandler();
        //DataTable productList = handler.GetProductsByID(StallID);
        ProductList.DataSource = _productList;
        ProductList.DataBind();
    }

    protected void TextBox_TextChanged(object sender, EventArgs e)
    {
        TextBox thisTextBox = (TextBox)sender;
        GridViewRow thisGridViewRow = (GridViewRow)thisTextBox.Parent.Parent;
        int row = thisGridViewRow.RowIndex;
        rowChanged[row] = true;
    }

    protected void cbDelete_CheckedChanged(object sender, EventArgs e)
    {
        CheckBox thisCheckbox = (CheckBox)sender;
        GridViewRow thisGridViewRow = (GridViewRow)thisCheckbox.Parent.Parent;
        int row = thisGridViewRow.RowIndex;
        rowDeleted[row] = true;
    }

    protected void Page_PreRender(object sender, EventArgs e)
    {
        //if (Page.IsPostBack)
        //{
        //  ProductList.DataBind();
        //}
    }

    protected void ProductList_PageIndexChanged(object sender, EventArgs e)
    {

    }

    protected void ProductList_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        ProductList.PageIndex = e.NewPageIndex;
        ProductList.DataBind();
    }

    protected void AddBtn_Click(object sender, System.Web.UI.ImageClickEventArgs e)
    {
        Response.Redirect("../StallHolder/AddProduct.aspx");
    }

    protected void DeleteBtn_Click(object sender, System.Web.UI.ImageClickEventArgs e)
    {
        int totalRows = ProductList.Rows.Count;
        for (int r = 0; r < totalRows; r++)
        {
            if (rowDeleted[r])
            {
                GridViewRow thisGridViewRow = ProductList.Rows[r];
                HiddenField hf1 = (HiddenField)thisGridViewRow.FindControl("HiddenField1");
                int ID = Convert.ToInt16(hf1.Value);
                //StallHandler handler = new StallHandler();
                //handler.DeleteProduct(Convert.ToInt16(ID));

                _productList = _productList.Where(a => a.productID != ID).ToList();
            }
        }
        BindList();
    }

    protected void SaveBtn_Click(object sender, System.Web.UI.ImageClickEventArgs e)
    {
        int totalRows = ProductList.Rows.Count;
        for (int r = 0; r < totalRows; r++)
        {
            if (rowChanged[r])
            {
                GridViewRow thisGridViewRow = ProductList.Rows[r];
                HiddenField hf1 = (HiddenField)thisGridViewRow.FindControl("HiddenField1");
                int ID = Convert.ToInt32(hf1.Value);
                TextBox tbName = (TextBox)thisGridViewRow.FindControl("tbName");
                string Name = tbName.Text;
                TextBox tbDesc = (TextBox)thisGridViewRow.FindControl("tbDesc");
                string Desc = tbDesc.Text;
                TextBox tbPrice = (TextBox)thisGridViewRow.FindControl("tbPrice");
                string Price = tbPrice.Text;
                //Code to update the database!

                var product = _productList.Where(a => a.productID == ID).First();
                product.productName = Name;
                product.productDesc = Desc;
                product.productPrice = decimal.Parse(Price, System.Globalization.NumberStyles.Currency);
            }
        }
        BindList();
    }
}

public class Product
{
    public int productID { get; set; }
    public string productName { get; set; }
    public string productDesc { get; set; }
    public decimal productPrice { get; set; }
}

我要创建我自己的类作为数据源用来测试。只是删除code的那些位您的解决方案。

I had to create my own class to use as the data source to test this. Just remove those bits of code for your solution.

正如你所看到的，我做了一些改变：

As you can see, I've made some changes:


  1. 设置的AutoPostBack =FALSE的复选框和文本框。

  2. 删除了＆LT;触发器＆GT; 元素，这仅适用于控制之外的的的UpdatePanel 。

  3. 新增了 OnCheckedChanged =cbDelete_CheckedChanged元素的复选框。

  1. Set AutoPostback="False" for the check box and text boxes.
  2. Removed the <Triggers> element, as this only applies to controls outside the UpdatePanel.
  3. Added the OnCheckedChanged="cbDelete_CheckedChanged" element to the check box.

一些细微的变化也没有，但值得一提的。虽然我应该提到我不是你做了这些方式的风扇，但它似乎工作。

Some minor changes also but none worth mentioning. Although I should mention I'm not a fan of the way you have done this, but it does seem to work.

这篇关于文本框框TextChanged事件和CheckBoc的CheckedChanged事件的GridView中没有发射的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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