Question

我有一个包含文本框和下拉列表的gridview。在gvScheduleBattingScore_RowDataBound事件中，我正在绑定下拉列表而没有任何问题。按钮控件位于gridview外部。我实际上想在 buttonclickevent 上提交所有文本框值并将所选值下拉到数据库但是我不知道我哪里出错了。问题是文本框不包含任何文本并且正在获取异常

输入字符串的格式不正确。

请帮帮我......

<asp:GridView ID="gvScheduleBattingScore" runat="server" AllowSorting="false" AutoGenerateColumns="False" AllowPaging="false"
                 GridLines="None" CellPadding="1" CssClass="GridViewStyle" ShowFooter="false" width="100%"
                 OnRowDataBound="gvScheduleBattingScore_RowDataBound">                
                    <Columns>
                        <asp:BoundField DataField="P_PlayerId" HeaderText="Player Id" HeaderStyle-Wrap="true" HeaderStyle-Width="5%" Visible="false"/>
                        <asp:BoundField DataField="PlayerName" HeaderText="Player Name" HeaderStyle-Wrap="true" HeaderStyle-Width="30%"/>
                        <asp:TemplateField HeaderText="Playing Order" HeaderStyle-Wrap="true" HeaderStyle-Width="5%">
                            <ItemTemplate>
                                <asp:TextBox ID="txtPlayingOrder" runat="server" CssClass="TinyTexBox"></asp:TextBox>
                            </ItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="Status">
                            <ItemTemplate>
                                <asp:TextBox ID="txtStatus" runat="server"></asp:TextBox>
                            </ItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="Bold By">
                            <ItemTemplate>
                                <asp:DropDownList ID="ddlBoldBy" runat="server">                       </asp:DropDownList>
                            </ItemTemplate>
                        </asp:TemplateField>
                   </Columns>
                </asp:GridView>
</br>
<asp:Button ID="ButtonAdd" runat="server" Text="Add" CssClass="SmallButton" 
                                 ValidationGroup="Add" onclick="ButtonAdd_Click"/>

On ButtonClick事件：

protected void ButtonAdd_Click(object sender, EventArgs e)
        {
            SqlConnection dBConnection = null;
            try
            {
                int playerId;
                short plyerOrder;
                string BatsmanStatus;
                int boldBy;

                dBConnection = new SqlConnection();
                dBConnection.ConnectionString = ConfigurationManager.ConnectionStrings["CriConn"].ConnectionString;

                SqlDataAdapter dataAdapter = new SqlDataAdapter();
                SqlCommand cmd = new SqlCommand("SP_InsertScores", dBConnection);
                cmd.CommandType = CommandType.StoredProcedure;

                foreach (GridViewRow GVRow in gvScheduleBattingScore.Rows)
                {
                    string textPlayerId = GVRow.Cells[0].Text;
                    TextBox textPlyerOrder = (TextBox)GVRow.Cells[1].FindControl("txtPlayingOrder"); 
                    TextBox textBatsmanStatus = GVRow.Cells[2].FindControl("txtStatus") as TextBox;
                    DropDownList DropDownBoldBy = (DropDownList)GVRow.Cells[18].FindControl("ddlBoldBy");

playerId = Convert.ToInt32(textPlayerId );
                    if (!string.IsNullOrEmpty(textPlyerOrder.Text))
                        plyerOrder = Convert.ToInt16(textPlyerOrder.Text);
                    if (!string.IsNullOrEmpty(textBatsmanStatus.Text))
                        BatsmanStatus = textBatsmanStatus.Text;
                    if (!string.IsNullOrEmpty(DropDownBoldBy.SelectedValue) && DropDownLbwBy.SelectedValue != "Select")
                        boldBy = Convert.ToInt32(DropDownBoldBy.SelectedValue);

                        cmd.Parameters.Add("@PlayerId", SqlDbType.NVarChar).Value = playerId;
cmd.Parameters.Add("@PlayerId", SqlDbType.Int).Value = playerId;
cmd.Parameters.Add("@plyerOrder", SqlDbType.Int).Value = plyerOrder;
cmd.Parameters.Add("@BatsmanStatus", SqlDbType.NVarChar).Value = BatsmanStatus;

                    dBConnection.Open();
                    dataAdapter.InsertCommand = cmd;
                    cmd.ExecuteNonQuery();
                    dBConnection.Close();
                    }
                }
                catch (Exception ex)
                {
                    throw ex;
                }
                finally
                {
                    // Close data reader object and database connection
                    cmd.Dispose();
                    cmd = null;
                    if (dBConnection.State == ConnectionState.Open)
                        dBConnection.Close();
                }

Answer 1

根据与 @ bhoopendra.sahoo 的聊天讨论，我们得出结论，这是一个绑定问题。

当触发按钮点击事件时，GridView再次绑定导致问题。

修复方法是仅绑定GridView一次，并在其他事件期间限制其绑定。

Answer 2

在将文本框值转换为int

之前添加空检查

if (!string.IsNullOrEmpty(textPlayerId.Text))
    playerId = Convert.ToInt32(textPlayerId);

还要对代码进行这些更改，以便在正确的单元格中找到文本框控件

TextBox textPlyerOrder = (TextBox)GVRow.Cells[2].FindControl("txtPlayingOrder"); 
TextBox textBatsmanStatus = (TextBox)GVRow.Cells[3].FindControl("txtStatus");

如何从gridview中检索文本框文本

2 个答案: