C# C代码隐藏控制表单执行

我有一个表单，我想在添加新记录和编辑现有记录时重用它。当我从GridView中选择一条记录时，我能够成功地加载包含相关数据的页面，并且我能够适当地更新db记录。然而，我的问题是尝试将表单用于两种执行。下面是我在代码隐藏中的逻辑：当我在GridView中单击行时，我分配了一个会话变量，这确实有效

protected void Page_Load(object sender, EventArgs e)
{
    resultOutput.Visible = false;//Output results as to whether or not a record was added successfully is automatically hidden at page load

    //Checking to see if session variable has been created
    if (Session["editID"] != null)
    {               
        //Create objects to get recipe data
        dbCRUD db = new dbCRUD();
        Recipe editRecipe = new Recipe();

        //Grabbing session ID and assigning to a variable in order to remove the session variable
        var id = Convert.ToInt32(Session["editID"]);
        Session.Remove("editID");

        //Call method to retrieve db data
        editRecipe = db.SelectRecord(id);

        //Populate results to text boxes
        recordID.Text = id.ToString();
        addName.Text = editRecipe.Name;
        addTypeDDL.SelectedValue = editRecipe.Meal;
        addDifficultyDDL.SelectedValue = editRecipe.Difficulty;
        addCookTime.Text = editRecipe.Cook_Time.ToString();
        addDirections.Text = editRecipe.Directions;

        //Change Button Text
        submitRecord.Visible = false;
        changeRecord.Visible = true;

        //Change Title Text
        addEditTitle.Text = "Edit Recipe";

    }
}

protected void submitRecord_Click(object sender, EventArgs e) 
{
    //Variables for execution results
    var modified = "";
    int returned = 0;

    //Creating the recipe Object to pull the values from the form and 
    //send the recipe object as a parameter to the method containing insert stored procedure
    //depending on Add or Edit
    Recipe recipe = new Recipe();
    recipe.Name = addName.Text;
    recipe.Meal = addTypeDDL.Text;
    recipe.Difficulty = addDifficultyDDL.Text;
    recipe.Cook_Time = int.Parse(addCookTime.Text);
    recipe.Directions = addDirections.Text;

    //Creating object to access insert method
    dbCRUD newRecord = new dbCRUD();

    //Checking to see if the page is loaded for edit or new addition
    if (Session["editID"] != null)
    {
        //If recordID exists, recipe will be passed as to UpdateRecord method
        recipe.Recipe_ID = int.Parse(recordID.Text);
        returned = newRecord.UpdateRecord(recipe);
        modified = "has been edited.";
        Session.Remove("editID");
    }
    else
    {
        //If recordID does not exist, record will be passed to InsertRecord method (new recipe)
        returned = newRecord.InsertRecord(recipe);
        modified = "added";
    }

    //Method returns 0 if successful, 1 if sql error, 2 if other error
    if (returned == 1)
    {
        resultOutput.Text = "There was an sql exception";
        resultOutput.Visible = true;
    }
    else if (returned == 2)
    {
        resultOutput.Text = "There was a non sql exception";
        resultOutput.Visible = true;
    }
    else
    {
        resultOutput.Text = "\"" + addName.Text + "\" recipe " + modified;
        resultOutput.Visible = true;
    }

}

我在ifSession[editID]上有问题空行-我总是移动到else逻辑，而if逻辑从不运行

以下是我在GridView中的单击方法：

protected void Grid_Recipe_SelectedIndexChanged(object sender, EventArgs e)
{
    int index = Convert.ToInt32(Grid_Recipe.SelectedDataKey.Value);
    Session["editID"] = index;
    Response.Redirect("addRecord.aspx");
}

---

我的问题是如何在submitRecord_Click事件期间控制执行，以便调用适当的方法。谢谢

您考虑过使用

if(Page.IsPostBack)
{
   code here
}

检测您是否正在发回页面？然后您可以检查项目的价值。我看不出代码不应该出现在会话变量中的任何原因-您是否尝试过在其中放置断点以查看代码是否实际出现在其中

您的addRecord.aspx是否也只是添加记录？如果是这样，只需在这个类中添加记录，但使用回发检查查看。您能否确保您也在正确的上下文中保存：

// Outside of Web Forms page class, use HttpContext.Current.
HttpContext context = HttpContext.Current;
context.Session["editID"] = index;
...
int Id = (string)(context.Session["editID"]);

---

我能够解决我的问题——这实际上变成了两个问题。首先，我必须将我的页面加载逻辑放入if！IsPostBack语句，因为我无法编辑该页。原因是我在页面加载时将最初发布的数据加载到表单中，页面加载在我的逻辑之前执行。添加if！IsPostBack控制语句修复了此问题。从那时起，我仍然使用会话变量来控制逻辑背后的代码，只是我确保会话变量只在表单和gridview之间。基本上，当gridview加载且不是回发时，会话变量被清除。这让我在单击一行时设置一个新的会话变量，然后在返回网格查看结果时清除会话变量。谢谢你的帮助

我忘了我在上面的代码中包含了一个调用，以便在加载文本后删除会话变量。这让我看到会话变量出现在前面提到的if语句中，但由于某种原因，我无法再从web表单OnClick中提取更改后的值？？？正在处理它…你会有其他页面遵循类似的模式吗？我绝对希望有最少的代码量。我不想创建一个单独的表单来捕获相同的内容，我希望使用相同的方法从文本框中提取数据，从而尝试通过基于会话变量的if语句来控制执行。我对更好的方法持开放态度，尽管这可能超出了我的问题范围。