c# - “An unhandled exception of type 'System.InvalidOperationException' occurred in System.Data.dll” -

-

मैं माइक्रोसॉफ्ट एक्सेस 2013 (डेटाबेस नाम: kyt, टेबल नाम: vg_info_table) का उपयोग करता हूं। जब मैं यह कोड चलाता हूं, तो यह काम करता है, लेकिन जब मैं कोंबबोक्स से चयनित मान को चुनता हूं और भेजें बटन पर क्लिक करता हूं (एक मान मेरे डेटाबेस में दर्ज किया जाना चाहिए; vg_1 फ़ील्ड) मुझे एक त्रुटि मिलती है ( komut.ExecuteNonQuery (); ):

.data.dll

अतिरिक्त जानकारी:

प्रकार के एक अप्रतिबंधित अपवाद प्रकार 'System.InvalidOperationException' में हुआ है। ExecuteNonQuery: कनेक्शन गुण प्रारंभ नहीं किया गया है।

मेरा पूरा कोड यहां है; 

  नामस्थान afeusdotnet {सार्वजनिक आंशिक वर्ग verigirisekranisorular1: UserControl {OleDbConnection bag = new OleDbConnection ("प्रदाता = Microsoft.ACE.OLEDB.12.0; डेटा स्रोत = kyt.accdb; निरंतर सुरक्षा जानकारी = गलत;"); डाटाटाबल टैब्लो = नया डेटाटाइल (); OleDbDataAdapter adptr = नया OleDbDataAdapter (); ओलेडीबी कॉमांड कॉम्यूट = नया ओलेडीबी कॉमांड (); डेटासेटसेट = नया डेटासेट (); Verigirisekranisorular2 soru2 = नया verigirisekranisorular2 (); सार्वजनिक verigirisekranisorular1 () {InitializeComponent (); } शून्य सूची () {बैग.उपन (); OleDbDataAdapter adptr = नया OleDbDataAdapter ("चुनें * से vg_info_table", बैग); adptr.Fill (tablo); adptr.Dispose (); bag.Close (); } निजी शून्य बटन 2_Click (वस्तु प्रेषक, EventArgs ई) {यदि (comboBox1.Text.ToString () == "") MessageBox.Show ("ilgili alanlarÄ ± doldurunuz"); Else {बैग.उपन (); Komut.CommandText = "vg_info_table (vg_1) मानों में सम्मिलित करें ('" + comboBox1.Text.ToString () + "')"; komut.ExecuteNonQuery (); bag.Close (); Listele (); MessageBox.Show ("kaydÄ ± n ± z tamamlandÄ ± diÃÆ'à ¢ एक, ¬ Å ¡Ãƒâ € SA, एक er sayfaya geçiniz"); }}}}    
 
 
 आपको  OleDbCommand ।  
  कोमट.कनेक्शन = बैग; Komut.CommandText = "vg_info_table (vg_1) मानों में सम्मिलित करें ('" + comboBox1.Text.ToString () + "')"; bag.Open (); komut.ExecuteNonQuery ();   
 इसके अलावा आपको एसक्यूएल-इंजेक्शन (अन्य बातों के अलावा) को रोकने के लिए स्ट्रिंग संयोजन के बजाय एसक्यूएल-पैरामीटर्स का उपयोग करना चाहिए।

Comments

Post a Comment

Popular posts from this blog

c# - Textbox not clickable but editable -

-
I have a small form with 10 text boxes, I have set them in the correct tab order. I want them on my tab service I was wondering if there is a way to set the text box so that they can be selected for editing until they are tabbed. That is ... I do not want the end user to edit the text box to click on them, I just want to make them editable through tabu. this should do the trick public partial category poor text box: Text Box {Safe Override Zero WndProc (Ref: Message Message) {if (m.msg == (Int) WM.LBUTTONDOWN) {Return; // mount down events} base.WndProc (ref m); }} Window message enum can be found. How to do this without anherizing: text box : class EatMouseDown: netwindows {safe override zero WndProc (ref message message) {if (m.msg == (int) WM.LBUTTONDOWN) {return; } Base.WandProc (Ref M); }} Safe Override Zero Onload (EventEurge E) {base.OnLoad (e); How to do this without any part: left a clean part, whatever is important, this can be a buggy but it works R...
Read more

Matlab transpose a table vector -

-
An embarrassing simple question seems to be, but how can I move a Matlab table vector? aTableT = aTable '; I tried a standard syntax for the simple interaction of a line vector to a line vector aTable : ATableT = reshape (aTable, 1, Height (aTable)); and aTableT = rot90 (aTable); According to the head, the last time table should work for table, see. However, I get this error code: Error type in using table / permit (line 396) Undefined function 'permute' for the input arguments. Error in rot 90 (line 29) b = magnitude (b, [2 1 3: ndims (a)]); NB: fliplr is not useful either pretty sure I have covered clear angles - any ideas? Thanks! Try changing your table into an array, move it, then back to a table In other words, try doing this: aTableArray = table2array (aTable); ATableT = array 2table (aTableArray. '); I have also read the document for rot90 , and it says that rot90 is definitely working for tables Do, and I find you...
Read more

ios - Adding an SKSpriteNode to SKScene from a child SKSpriteNode -

-
I have a SKScene where I am adding an SKSpriteNode I have subclassed the SKSpriteNode class to create this node. In the subclass I am defining some SKActions on Sprite. What do I want to do when the end of this phantom ends the SKAction sequence, then I add a new Prayer node to this scene. How is this possible. The following code is mine: The code for the sequence is that I'm running on the Scansprinitode subclass (TEMissileNode): - SKAction * moveDown = [SKAction moveToY: Self.position.y - 20 Duration: 0.2]; SKAction * animation = [SKAction animateWithTextures: textures timePerFrame: time / 7]; SKAction * moveMissileProjectile = [SKAction Moving: Pointoffscreen Term: Time]; SKAction * group = [SKAction group: @ [animation, movement projectile]]; SKAction * Sequence = [SKAction Sequence: @ [Hilldown, Group, [SKAction removalFromParent]]]; [Self run action: sequence]; From the main scene, I call those actions that execute these tasks TEMissileNode * missile = [tmissil...
Read more