OnRowUpdating Gridview 输入字符串的格式不正确

Question

我这辈子都想不通...我有一个附加了 sqldatasource 的 gridview，我在 editItemtemplate 中格式化了 fee_amt 像这样。当通过单击更新 lnk 按钮引发 OnRowUpdating 事件时，我收到此错误。另请注意，我将文本框中的数字格式化为“$”，例如“$200.00”。

我很确定问题出在 fee_amt 但我可能错了。

An unhandled exception was generated during the execution of the current web request.            Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace: 


[FormatException: Input string was not in a correct format.]
System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number,    NumberFormatInfo info, Boolean parseDecimal) +9592843
System.Number.ParseDecimal(String value, NumberStyles options, NumberFormatInfo numfmt)  +146
System.Convert.ToDecimal(String value, IFormatProvider provider) +67
System.String.System.IConvertible.ToDecimal(IFormatProvider provider) +10
System.Convert.ChangeType(Object value, TypeCode typeCode, IFormatProvider provider) +491
System.Web.UI.WebControls.Parameter.GetValue(Object value, String defaultValue, TypeCode type, Boolean convertEmptyStringToNull, Boolean ignoreNullableTypeChanges) +126
System.Web.UI.WebControls.Parameter.GetValue(Object value, Boolean ignoreNullableTypeChanges) +63
System.Web.UI.WebControls.SqlDataSourceView.AddParameters(DbCommand command, ParameterCollection reference, IDictionary parameters, IDictionary exclusionList, String oldValuesParameterFormatString) +550
System.Web.UI.WebControls.SqlDataSourceView.ExecuteUpdate(IDictionary keys, IDictionary values, IDictionary oldValues) +346
System.Web.UI.DataSourceView.Update(IDictionary keys, IDictionary values, IDictionary oldValues, DataSourceViewOperationCallback callback) +95
System.Web.UI.WebControls.GridView.HandleUpdate(GridViewRow row, Int32 rowIndex, Boolean causesValidation) +1226
System.Web.UI.WebControls.GridView.HandleEvent(EventArgs e, Boolean causesValidation, String validationGroup) +855
System.Web.UI.WebControls.GridView.OnBubbleEvent(Object source, EventArgs e) +95
System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +37
System.Web.UI.WebControls.GridViewRow.OnBubbleEvent(Object source, EventArgs e) +121
System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +37
System.Web.UI.WebControls.LinkButton.OnCommand(CommandEventArgs e) +125
System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) +169
System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +9
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +176
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563




 Protected Sub OnRowUpdating(ByVal sender As Object, ByVal e As GridViewUpdateEventArgs)      Handles GridViewDegfaultCharges.RowUpdating

    'OnRowUpdating Sets Update Params for the GridView

    Dim TextBox2 As TextBox    'category
    Dim TextBox3 As TextBox    'fee_name
    Dim TextBox4 As TextBox    'fee_amt
    Dim CheckBox1 As CheckBox  'inactive
    Dim blnValid As Boolean
    lblMessage.Text = ""
    blnValid = True

    TextBox2 = GridViewDegfaultCharges.Rows(e.RowIndex).FindControl("TextBox2")
    TextBox3 = GridViewDegfaultCharges.Rows(e.RowIndex).FindControl("TextBox3")
    TextBox4 = GridViewDegfaultCharges.Rows(e.RowIndex).FindControl("TextBox4")
    CheckBox1 = GridViewDegfaultCharges.Rows(e.RowIndex).FindControl("CheckBox1")



    If CheckDefaultChargesCategory(TextBox2.Text) Then
        lblMessage.Text = TextBox2.Text & " is not a valid Loan Type"
        blnValid = False
        e.Cancel = True
        Exit Sub
    End If



    SqlDataDefaultCharges.UpdateParameters("category").DefaultValue = TextBox2.Text
    SqlDataDefaultCharges.UpdateParameters("fee_name").DefaultValue = TextBox3.Text
    SqlDataDefaultCharges.UpdateParameters("fee_amt").DefaultValue = Convert.ToDecimal(TextBox4.Text).ToString()
    SqlDataDefaultCharges.UpdateParameters("investorID").DefaultValue = Convert.ToInt32(_pageID)
    SqlDataDefaultCharges.UpdateParameters("inactive").DefaultValue = CheckBox1.Checked

    If blnValid Then
        SqlDataDefaultCharges.Update()
    End If




End Sub

Answer 1

我可能是错的，我不确定你是如何处理这个值的，但是，“fee_amt”正在被转换为小数，然后再转换回字符串？

之前：

SqlDataDefaultCharges.UpdateParameters("fee_amt").DefaultValue = Convert.ToDecimal(TextBox4.Text).ToString()

之后：

SqlDataDefaultCharges.UpdateParameters("fee_amt").DefaultValue = Convert.ToDecimal(TextBox4.Text)

编辑：

当然，除非这个值应该是 string，在这种情况下使用 TextBox4.Text 就足够了。

基于 codingbiz 的 注释，如果在 textbox 中添加美元符号。 Convert.ToDecimal() 不起作用，因为 '$' 不是数值。我以为您在 TextBox 旁边显示“$”。