blocks|key|3901116|text|是的，您没有实现"AddToProductTbl(ProductTbl产品)“方法。实现该方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3901117|internal+void+AddToProductTbl(ProductTbl+product)
{
++++//implementation+for+actually+adding+product+to+the+product+table
}|code-block|syntax|javascript|3901118|确保还实现了"SaveChanges()“方法|3901119|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Yes, you did not implement the &quot;AddToProductTbl(ProductTbl product)&quot; method. Implement the method.
<pre><code>internal void AddToProductTbl(ProductTbl product)
{
 //implementation for actually adding product to the product table
}
</code></pre>
Make sure you implement the &quot;SaveChanges()&quot; method as well

blocks|key|3901187|text|@+Jacobrussell16。为了在数据库表"ProductTbl“中插入和保存新记录，您可以使用现有的+add+方法(Context.TableName.Add())添加记录并删除AddToProductTbl(ProductTbl产品)方法。您可以参考下面的代码示例。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|3901188|更新：|3901189|1.在数据库表中添加image列，并将其类型设置为varbinary(MAX)。|3901190|3901191|在Form.csDesign中添加pictureBox控件，然后双击以添加pictureBox1_Click事件。|ordered-list-item|3901192|3901193|3901194|修改Form.cs中的代码。|3901195|3901196|Form.cs中的代码：|3901197|ProductTblContext+cse+=+new+ProductTblContext+();
private+void+btnSave_Click(object+sender,+EventArgs+e)
+{
++ProductTbl+product+=+new+ProductTbl+();
++product.Id+=+int.Parse(txtId.Text);
++product.Name+=+txtProduct.Text;
++product.price+=+decimal.Parse(txtPrice.Text);
++product.description+=+txtDescription.Text;

++product.type+=+Convert.ToInt32(comboBox1.SelectedValue.ToString());
++MemoryStream+ms+=+new+MemoryStream();
++pictureBox1.Image.Save(ms,+System.Drawing.Imaging.ImageFormat.Png);
++ms.Dispose();
++product.image+=+ms.ToArray();

++cse.+ProductTbl.Add(product);
++cse.SaveChanges();
++MessageBox.Show("record+saved");
+}


+private+void+pictureBox1_Click(object+sender,+EventArgs+e)
+++{
+++++OpenFileDialog+openFileDialog+=+new+OpenFileDialog();
+++++openFileDialog.Filter+=+"@.jpg%7C*JPG%7C@.Png%7C*png%7C@Gif%7C*.gif%7C@.All+files%7C*.*";
+++++DialogResult+dr+=+openFileDialog.ShowDialog();
+++++if+(dr+==+DialogResult.OK)
+++++{
++++++FileStream+fs+=+new+FileStream(openFileDialog.FileName,FileMode.Open,FileAccess.Read);
++++++Image+im+=+Image.FromStream(fs);
++++++pictureBox1.Image+=+im;
+++++}
+++}+|code-block|syntax|javascript|3901198|ProductTblContext的相关代码如下：|3901199|public+partial+class+ProductTblContext:+DbContext
{
++++public+ProductTblContext()
++++++++:+base("name=+ProductTblContext")
++++{
++++}

++++public+virtual+DbSet<ProductTbl>+ProductTbl{+get;+set;+}

++++protected+override+void+OnModelCreating(DbModelBuilder+modelBuilder)
++++{
++++++++modelBuilder.Entity<ProductTbl>()
++++++++++++.Property(e+=>+e.Name)
++++++++++++.IsFixedLength();

++++++++modelBuilder.Entity<ProductTbl>()
++++++++++++.Property(e+=>+e.price)
++++++++++++.HasPrecision(18,+0);

++++++++modelBuilder.Entity<ProductTbl>()
++++++++++++.Property(e+=>+e.description)
++++++++++++.IsFixedLength();
++++}
}|3901200|结果如图所示：|3901201|📷|atomic|3901202|​|3901203|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/2bce46c5eae4eab475a9429e62ed1a50.gif|imageAlt^0|1I|5|0|0|3|0|0|0|0|0|0|0|0|0|0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|1J|8|@$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1M|8|@$9|1N|A|1O|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1P|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|1Q|8|@]|D|@]|E|$]]|$1|K|3|L|5|M|7|1R|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|1S|8|@]|D|@]|E|$]]|$1|O|3|-4|5|6|7|1T|8|@]|D|@]|E|$]]|$1|P|3|Q|5|M|7|1U|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|1V|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|1W|8|@]|D|@]|E|$]]|$1|U|3|V|5|W|7|1X|8|@]|D|@]|E|$X|Y]]|$1|Z|3|10|5|6|7|1Y|8|@]|D|@]|E|$]]|$1|11|3|12|5|W|7|1Z|8|@]|D|@]|E|$X|Y]]|$1|13|3|14|5|6|7|20|8|@]|D|@]|E|$]]|$1|15|3|16|5|17|7|21|8|@]|D|@$9|22|A|23|1|24]]|E|$]]|$1|18|3|19|5|6|7|25|8|@]|D|@]|E|$]]|$1|1A|3|-4|5|6|7|26|8|@]|D|@]|E|$]]]|1B|$1C|$5|1D|1E|1F|E|$1G|1H|1I|-4]]]]

@ Jacobrussell16.
For inserting and saving new records to the database table &quot;ProductTbl&quot;, you could use the existing Add method(Context.TableName.Add()) to add records and remove the AddToProductTbl(ProductTbl product) method. You can refer to the code sample below.
Update:
1.Add an image column to the database table and set its type to varbinary(MAX).
<ol start="2">
<li>Add the pictureBox control in Form.cs[Design] and double-click to add the pictureBox1_Click event.
</li>
<li>Modify the code in the Form.cs.
</li>
</ol>
The code in the Form.cs:
<pre><code>ProductTblContext cse = new ProductTblContext ();
private void btnSave_Click(object sender, EventArgs e)
 {
 ProductTbl product = new ProductTbl ();
 product.Id = int.Parse(txtId.Text);
 product.Name = txtProduct.Text;
 product.price = decimal.Parse(txtPrice.Text);
 product.description = txtDescription.Text;

 product.type = Convert.ToInt32(comboBox1.SelectedValue.ToString());
 MemoryStream ms = new MemoryStream();
 pictureBox1.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
 ms.Dispose();
 product.image = ms.ToArray();

 cse. ProductTbl.Add(product);
 cse.SaveChanges();
 MessageBox.Show(&quot;record saved&quot;);
 }


 private void pictureBox1_Click(object sender, EventArgs e)
 {
 OpenFileDialog openFileDialog = new OpenFileDialog();
 openFileDialog.Filter = &quot;@.jpg|*JPG|@.Png|*png|@Gif|*.gif|@.All files|*.*&quot;;
 DialogResult dr = openFileDialog.ShowDialog();
 if (dr == DialogResult.OK)
 {
 FileStream fs = new FileStream(openFileDialog.FileName,FileMode.Open,FileAccess.Read);
 Image im = Image.FromStream(fs);
 pictureBox1.Image = im;
 }
 } 
 
</code></pre>
The related code about ProductTblContext is as follows :
<pre><code>public partial class ProductTblContext: DbContext
{
 public ProductTblContext()
 : base(&quot;name= ProductTblContext&quot;)
 {
 }

 public virtual DbSet&lt;ProductTbl&gt; ProductTbl{ get; set; }

 protected override void OnModelCreating(DbModelBuilder modelBuilder)
 {
 modelBuilder.Entity&lt;ProductTbl&gt;()
 .Property(e =&gt; e.Name)
 .IsFixedLength();

 modelBuilder.Entity&lt;ProductTbl&gt;()
 .Property(e =&gt; e.price)
 .HasPrecision(18, 0);

 modelBuilder.Entity&lt;ProductTbl&gt;()
 .Property(e =&gt; e.description)
 .IsFixedLength();
 }
}
</code></pre>
The result is shown in the picture :
<a href="https://i.stack.imgur.com/y4V0q.gif" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/y4V0q.gif" alt="enter image description here" /></a>

New to c#, I'm attempting to save a new record to a database table 'ProductTbl'. The program begins by running a windows form with multiple inputs, namely description, price, category and image. Then the save button is clicked which should save new record to the table. Following is the savebtn click code.
<pre><code>private void btnSave_Click(object sender, EventArgs e)
 {
 ProductTbl product = new ProductTbl();

 product.Description = txtDescription.Text;

 product.Price = decimal.Parse(txtPrice.Text);

 product.Image = byteBLOBData;

 product.ProductType = (int)cboCategory.SelectedValue;

 cse.AddToProductTbl(product);

 cse.SaveChanges();

 MessageBox.Show(&quot;Record Saved&quot;);
 }
</code></pre>
Following on from the cse.AddToProductTbl(product); tag, is this code in the database context.
<pre><code>internal void AddToProductTbl(ProductTbl product)
 {
 throw new NotImplementedException();
 }
</code></pre>
I'm continuously receiving the same error;
<pre><code>System.NotImplementedException: 'The method or operation is not implemented.'
</code></pre>
Any help would be appreciated,
Thanks in Advance, Jacob

Exception Unhandled when adding new record to database table

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

c#新手，我正在尝试将新记录保存到数据库表'ProductTbl‘中。该程序首先运行具有多个输入的windows表单，即描述、价格、类别和图像。然后单击保存按钮，这应该会将新记录保存到表中。下面是savebtn点击代码。private void btnSave_Click(object sender, EventArg...

问向数据库表添加新记录时异常未处理
EN

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问向数据库表添加新记录时异常未处理EN