Dgvhelper,xmlhelper,inputbox (VBA-like), Evaluate (VBA in functions applied to C #)

Source: Internet
Author: User

1. When adding, deleting, modifying rows in DGV, operate on the DT and then refresh the XML

The CurrentRow in 2.datagridview is not necessarily the current selected row

3.inputbox class

stringSdescription = Inputbox.showinputbox ("Please enter a description of the expression! ");  Public classInputBox:System.Windows.Forms.Form {PrivateSystem.Windows.Forms.Label Label1; PrivateSystem.Windows.Forms.TextBox Tbdata; PrivateSystem.Windows.Forms.Button Btnok; PrivateSystem.Windows.Forms.Button Btncancel; PrivateSystem.Windows.Forms.ToolTip ttpshow; PrivateSystem.ComponentModel.Container components =NULL; PrivateInputBox () {InitializeComponent (); }        protected Override voidDispose (BOOLdisposing) {            if(disposing) {if(Components! =NULL) {components.                Dispose (); }            }            Base.        Dispose (disposing); }        Private voidInitializeComponent () { This. components =NewSystem.ComponentModel.Container ();  This. Label1 =NewSystem.Windows.Forms.Label ();  This. Tbdata =NewSystem.Windows.Forms.TextBox ();  This. Btnok =NewSystem.Windows.Forms.Button ();  This. Btncancel =NewSystem.Windows.Forms.Button ();  This.            SuspendLayout (); //             //Label1//              This. Label1. AutoSize =true;  This. Label1. Location =NewSystem.Drawing.Point ( -, -);  This. Label1. Name ="Label1";  This. Label1. Size =NewSystem.Drawing.Size ( $, A);  This. Label1. TabIndex =0;  This. Label1. Text ="Enter here:"; //             //Tbdata//              This. tbdata.location =NewSystem.Drawing.Point ( -,Ten);  This. Tbdata.name ="Tbdata";  This. tbdata.size =NewSystem.Drawing.Size (471, +);  This. Tbdata.tabindex =1; //             //Btnok//              This. btnok.location =NewSystem.Drawing.Point (146, +);  This. Btnok.name ="Btnok";  This. btnok.size =NewSystem.Drawing.Size ( the, at);  This. Btnok.tabindex =2;  This. Btnok.text ="Determine";  This. Btnok.usevisualstylebackcolor =true;  This. Btnok.click + =NewSystem.EventHandler ( This. Btnok_click); //             //Btncancel//              This. btncancel.location =NewSystem.Drawing.Point (373, +);  This. Btncancel.name ="Btncancel";  This. btncancel.size =NewSystem.Drawing.Size ( the, at);  This. Btncancel.tabindex =2;  This. Btncancel.text ="Cancel";  This. Btncancel.usevisualstylebackcolor =true;  This. Btncancel.click + =NewSystem.EventHandler ( This. Btncancel_click); //             //InputBox//              This. AutoScaleBaseSize =NewSystem.Drawing.Size (6, -);  This. ClientSize =NewSystem.Drawing.Size (567, the);  This. ControlBox =false;  This. Controls.Add ( This. Btncancel);  This. Controls.Add ( This. Btnok);  This. Controls.Add ( This. Tbdata);  This. Controls.Add ( This. Label1);  This. FormBorderStyle =System.Windows.Forms.FormBorderStyle.FixedDialog;  This. Name ="InputBox";  This. Text ="InputBox";  This. ResumeLayout (false); }        Private voidBtnok_click (Objectsender, EventArgs e) {             This.        Close (); }        Private voidBtncancel_click (Objectsender, EventArgs e) {             This.        Close (); }        /// <summary>        ///Show Input Box/// </summary>        /// <param name= "Sheadtext" ></param>        /// <param name= "Shistorytext" ></param>        /// <returns></returns>         Public Static stringShowinputbox (stringSheadtext,stringshistorytext="") {InputBox InputBox=NewInputBox (); InputBox. StartPosition=formstartposition.centerparent; InputBox. Text=Sheadtext; if(shistorytext!="") {Inputbox.tbData.Text=Shistorytext; } InputBox.            ShowDialog (); returnInputbox.tbData.Text; }    }

4. Evaluate calculation by the formula in Excel VBA

    /// <summary>    ///computes a string using the Evaluate method of VBA in Excel/// </summary>    /// <param name= "str" ></param>    /// <returns></returns>     Public Static DoubleCal ( This stringstr) {      varApp =NewExcel.Application (); Excel.Workbook Workbook=app.      Workbooks.Add (); Excel.Worksheet Worksheet= Workbook. Worksheets.add () asExcel.Worksheet; varresult =worksheet.      Evaluate (str); App. DisplayAlerts=false; App.      Quit (); Doubledata =Double. Parse (result.      ToString ()); returndata; }

5. Meaning of the error return in the previous item

-2146826281 =#div/0!
-2146826259 =#name?
-2146826288 =#null!
-2146826252 =#num!
-2146826265 =#ref! <-yours!
-2146826273 = value!

Dgvhelper,xmlhelper,inputbox (VBA-like), Evaluate (VBA in functions applied to C #)

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